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Posted: 12/15/2020 7:27:14 PM EDT
[Last Edit: Techsan02]
Do we have an 'official' 300 WM thread? If so, link? If not, can we?
Seems like most preferred loads are with H1000 or H4350, both which are difficult to come by. Anyone using a different powder in their preferred load? Looks like SAAMI spec is 3.340 OAL...but tons of online sources show OALs well beyond that. Are people just pushing their luck, or is that actually a valid, safe thing to do? |
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Signatures are stupid and annoying.
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[Last Edit: j1r11]
[#1]
Anything more that that would not fit in a friends tikka t3 magizine. Even loaded to that with 165 ballistic tips he don't have much neck tension due to being at the end of the ogive. If he drops a bullet it sometimes falls inside the case.
I use imr-4350. |
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[#2]
Inlaw uses IMR-4831
300 WM not one of my flavors |
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[#3]
As far as the OAL, that is common for people to seat the bullet out as far as possible, normally you have to single feed the rifle unless you can come up with a longer magazine or box setup for it..such as a Wyatts long action 4" box setup or 3.850" AICS CIP magazines... By seating the bullet all the way out, it maximizes case space and allows you to load more powder safely and get more energy and more velocity..As an example, my 300rum calls for a max OAL of 3.6", my LR load measure just shy of 4.00" that I single feed and my magazine length load is just shy of 3.795" on an AICS 3.850" CIP magazine kit...
This will give you an idea, the bullet on top is loaded just shy of 3.600", the second one is at 3.790" and the bottom one is at 3.950"... Attached File |
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[Last Edit: Hoser]
[#4]
I have had the best luck with H-4831SC and H-1000 using Berger 215 and 230s. For light bullets the Sierra 155 and 190 were solid.
All of mine were loaded off the lands and also to CIP mag length in an Accuracy International PSR. They use Bartlien barrels and Dave Tooley is the gunsmith. I am looking forward to trying Lapua brass. Right now I am using Winchester and Norma brass. |
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[Last Edit: cruze5]
[#5]
I am shooting a 208 grain bullet at 2830 with H1k powder loaded at 3.6 OAL
I also shoot a 190 smk w rl22 |
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Global Warming Hoax Skeptic before it was cool
WA, USA
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[#6]
Originally Posted By Techsan02: Do we have an 'official' 300 WM thread? If so, link? If not, can we? Seems like most preferred loads are with H1000 or H4350, both which are difficult to come by. Anyone using a different powder in their preferred load? Looks like SAAMI spec is 3.340 OAL...but tons of online sources show OALs well beyond that. Are people just pushing their luck, or is that actually a valid, safe thing to do? View Quote It the thread takes off I can set the archive toggle to keep it out of the archives. |
Selling agent for Algores carbon credit scam.
Shooting and Reloading, one hobby feeds the other. |
[#7]
Originally Posted By AKSnowRider: As far as the OAL, that is common for people to seat the bullet out as far as possible, normally you have to single feed the rifle unless you can come up with a longer magazine or box setup for it..such as a Wyatts long action 4" box setup or 3.850" AICS CIP magazines... By seating the bullet all the way out, it maximizes case space and allows you to load more powder safely and get more energy and more velocity..As an example, my 300rum calls for a max OAL of 3.6", my LR load measure just shy of 4.00" that I single feed and my magazine length load is just shy of 3.795" on an AICS 3.850" CIP magazine kit... This will give you an idea, the bullet on top is loaded just shy of 3.600", the second one is at 3.790" and the bottom one is at 3.950"... https://www.AR15.Com/media/mediaFiles/404934/A116A2FF-929C-4ABA-BC50-AC88C5F9A260_jpe-1732840.JPG View Quote Makes sense. This will be primarily a hunting rifle (bergara), so loads will need to fit in magazine, no single feeding for most uses. I’ll need to figure the max length that stacks in the magazine and go from there. |
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Signatures are stupid and annoying.
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[#8]
I've used 200 grain nosler partitions just below maximum loads using RL22 for many years. OAL was driven by magazine length.
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[#9]
Tag for info. My dad wants me to load some for his 300WM.
I have some 220 gr Seirra match kings. I need to buy some powder. I haven't looked up the load data yet, I was hoping for a Reloader 17 load since I have it. |
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[Last Edit: Techsan02]
[#10]
The Hodgdon website shows a lot of loads using hybrid 100V for 300WM. Anyone have experience with that powder?
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Signatures are stupid and annoying.
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[#11]
Originally Posted By Hoser: I have had the best luck with H-4831SC and H-1000 using Berger 215 and 230s. For light bullets the Sierra 155 and 190 were solid. All of mine were loaded off the lands and also to CIP mag length in an Accuracy International PSR. They use Bartlien barrels and Dave Tooley is the gunsmith. I am looking forward to trying Lapua brass. Right now I am using Winchester and Norma brass. View Quote ADG WM brass is also excellent if you can find some. |
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[#12]
Originally Posted By Techsan02: Makes sense. This will be primarily a hunting rifle (bergara), so loads will need to fit in magazine, no single feeding for most uses. I’ll need to figure the max length that stacks in the magazine and go from there. View Quote Take a look at the accubond lr 190 grain. Awesome bullet out past 600 yards. |
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"Republic, I like the sound of the word. It means people can live free, talk free, go or come, buy or sell, be drunk or sober however they choose." John Wayne
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I'm not lazy, I just really enjoy doing nothing.
USA
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[Last Edit: Cycolac]
[#13]
150 gr ballistic tip over 78 gr IMR 4851(?) clocked just shy of 3400fps. Loaded to fit in the magazine.
Devastating on whitetail. |
I can explain it to you but I can't understand it for you.
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[#14]
I've wanted to get a 300 Win mag for a long time, then about the time I was actually going to get one, they came out with the 300WSM, wasn't sure if I should go with that as it could be had with lighter rifles. Then I thought do I want a lighter rifle with that much pop? I always liked belted magnums too though, my dad always shot a 7mm Rem Mag when I was growing up. I think I head faked myself out too much so I ended up not getting either. Anyone here shoot both?
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[Last Edit: borderpatrol]
[#15]
Remington 40X single shot short action with 27.5" barrel.
Winchester brass Remington 9.5 Magnum primer OAL -.025" short of the rifling RE-22 190 grain SMK loaded with RE-22 to achieve 2900 fps. (I won't post my data because it's lower than normal) 200 grain SMK (old style 200, not the new VLD style model) loaded with RE-22 to achieve 2800 fps. (ditto) My longer barrel doesn't need anywhere near the powder needed to achieve these velocities from a 24". I ran ladder tests and these loads shot the best from my rifle. |
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[Last Edit: ole_slewfoot]
[#16]
Just getting ready to start testing loads for 300 Win Mag with a 1:9 twist 26" barrel for my brother.
Powders in stock so far IMR7977 H1000 4831SC H4350 Hybrid 100V Bullets for testing 220 grain Nosler Custom Comps. 190 grain SMKs 175 grain Nosler Custom Comps. 168 grain SMKs Primers for testing Federal LR Magnums CCI LR Magnums Hope to start testing soon as we get some good weather. |
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Call Sign- Potato
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Global Warming Hoax Skeptic before it was cool
WA, USA
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[#17]
Congrats OP, this thread took off.
Archive toggle set to keep this thread out of the archives. |
Selling agent for Algores carbon credit scam.
Shooting and Reloading, one hobby feeds the other. |
[Last Edit: DVCER]
[#18]
I am now really liking my 300, enough so to start looking for a new one, with a threaded muzzle. My old one had me hating the caliber, till I got this.
Now I’m going to follow this thread and learn all about rolling my own ammo, cause I can shoot this thing, a lot. Attached File Attached File |
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"The true soldier fights not because he hates what is in front of him, but because he loves what is behind him."
G. K. Chesterton |
[Last Edit: lokifox]
[#19]
I'm going to be a weirdo here...
My two favorite loads are the 130 gr. Barnes TTSX over RL-17 for deer hunting, and the 178 gr. Hornady BTHP over RL-26 for target shooting. The 130 Barnes would probably do well with RL-16 too but I haven't played with that combo. It would be more temperature stable than RL-17. As far as brass goes, Sig 300WM brass is insanely good. IME it's better than Norma which costs about 3X as much. I'm getting .001" of bullet runout on most cases without any case prep. |
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Freedom costs a buck-o-five.
7.62 > 5.45 ---- It really does pound shit harder. |
[#20]
Anyone have a decent load for Hornady 180 SSTs and Reloader 17?
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[Last Edit: Shootindave]
[#21]
@Techsan02 I saw your question in the mega thread.
I posted the above question and didn't get a response. I have loaded 66 grains of Re-17. We will see how it goes. |
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[Last Edit: Nobody1]
[#22]
Interesting new option for brass.
Maybe this isn’t a realistic option at the expense but I wanted to share. Great thread OP. Peterson Long 300 Win Mag Brass |
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[Last Edit: Techsan02]
[#23]
Watched most of this video. Seems like decent info. Not sure if Johnny's reloading bench is a respected source or not. (Didn’t realize the video above was from same youtuber )
300 Win Mag - Getting started with reloading |
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Signatures are stupid and annoying.
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[#24]
72g R22 under anything 190g is phenomenal!
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[#25]
Originally Posted By Jetpig: 72g R22 under anything 190g is phenomenal! View Quote It isn’t really great temp stable but it really does shoot well in my model 70 super grade. I started with Nosler 180 grain ballistic tips and couldn’t get a load over a moa. This is with the Boss unit set per the manual for 180s? I want to try some Hornady GMX 150s. |
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[#26]
I have had good luck with H4831 and IMR4831 with 180 gr bullets. I have my hunting load with a 180 barnes ttsx using barnes max load data. Sierra game king 180 btsp also shot very well using h4831.
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[Last Edit: Dominion21]
[#27]
Originally Posted By Techsan02: Watched most of this video. Seems like decent info. Not sure if Johnny's reloading bench is a respected source or not. (Didn’t realize the video above was from same youtuber ) https://www.youtube.com/watch?v=g33otalNvtg View Quote @Techsan02 @Nobody1 The 300 WinMag test-bed that YouTuber (Johnny’s Reloading Bench)!uses is a Thompson/Center Compass rifle: it features a sub-MOA accuracy guarantee. Another reloading YouTuber who uses the TC Compass in 300 WinMag is here: Bolt Action Reloading Amazingly, the Compass sells for as little as $200 (now up to about $300 - still an amazing deal for an accurate 300 Win Mag). I did an archived thread (where I reloaded 300 Win Mag) on this same rifle (mine not only meets their 3-round MOA guarantee, it meets it for real, 5-shot groups). The reloading photos / info is all on page 2 of the thread: https://www.ar15.com/forums/General/-ARCHIVED-THREAD-A-sub-MOA-rifle-for-less-than-the-price-of-a-HiPoint-40-UPDATE-sub-MOA-achieved-pics-on-p-3/5-2047837/?page=2 I think you can tell I was in a rush to test the manufacturers guarantee; I could have spent at lot more time and used more equipment / components. But I predicted the little flat-base Speer 125s would shoot small groups at 100, and I wasn’t disappointed! |
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Executive Director, Vast Right Wing Conspiracy
NC, USA
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[#28]
I keep my OAL in SAAMI spec to it'll feed properly from the box magazine of my Browning A-Bolt II.
I push 165/168 Barnes bullets using RL-22. |
The enemy of America is the Democrat Party.
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[Last Edit: Dominion21]
[#29]
Originally Posted By Shootindave: Tag for info. My dad wants me to load some for his 300WM. I have some 220 gr Seirra match kings. I need to buy some powder. I haven't looked up the load data yet, I was hoping for a Reloader 17 load since I have it. View Quote The military sniper load - Mk248 Mod 1 uses the Sierra brand 220 OTM bullet, over Hodgdon H1000 powder. Here is one attempt to clone MK 248 Mod 1 Cloning MK 248 Mod 1 - Part 1 - 300 Win Mag The danger with just making a “clone load” - as opposed to a safe work-up is: - you have no idea how .mil chambers their guns. They are not bound by SAAMI and they do whatever they want / works for them, and - the .mil version of H1000 they are using might vary from what you find on the shelf at the local gun store. No way to tell for sure, so it’s best to start 10% low and work up. |
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[#30]
Starting to prep some once fired brass for my first attempts at loading 300WM.
All brass came from one rifle, and will be fired from the same rifle. For comparison, using my Hornady LnL Headspace Comparator, I measured some factory loaded ammo. Federal 2.256” Hornady GMX 2.262” Hornady TAP 2.261” Barnes 2.258” Winchester 2.258” All loaded rounds slide right in and out of chamber, and bolt closes, with no resistance or effort. Then I measured some brass fired from rifle: Fired Brass (avg) 2.275” Should I bump the shoulder back at all? |
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Signatures are stupid and annoying.
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[#31]
Loaded up some rounds
COAL 3.570” Hornady 178gr BTHP Hodgdon 4350 powder CCI 250 LRM primer Winchester brass trimmed to 2.605” Loaded from 65-68 grains. 66.5 got me the best group, but my last shot on the 68.0 group was a dead flinch, opened up the group by an inch or so. Bergara B14 ridge |
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Signatures are stupid and annoying.
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[Last Edit: ThrdKllr]
[#32]
Loaded up a few rounds doing a load work up:
Peterson Long brass new IMR 4350 72.0 grns Nosler BT 150 grns CCI 250 primers CBTO 2.8270 COAL 3.4500 .105 jump Nowhere near a maximum load in my rifle. Shot two groups. .3 and a .175 ctc @100 yds. Just starting load development for this rifle. A Weatherby Vanguard S2. It has the #2 contour @26”. I think it’s a keeper for a hunting rifle. Working with H4350 now as I have a butt load of it and only 8# of the IMR. |
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Global Warming Hoax Skeptic before it was cool
WA, USA
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[#33]
Good to see this thread back on page 1.
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Selling agent for Algores carbon credit scam.
Shooting and Reloading, one hobby feeds the other. |
[#34]
I did a few more loads up to 69.5gr h4350. No signs of pressure on any of them, but at 69.5 I started noticing more recoil. Shot my best group with 69.0.
I won’t shoot much 178gr, but I do have some 178 eldX that’ll put the hurt on some deer. |
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Signatures are stupid and annoying.
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[#35]
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[Last Edit: ThrdKllr]
[#36]
Tried to quote the post by Nobody1 but I guess it was too long.
This is the brass I’m using. With this brass,I have .002 clearance from base to shoulder. 50 pieces varied by 1.4 grns and had I kicked out the lightest 1 It would have been less than 1 grn. for the 49 left. Great brass consistency wise. I’ll see how it lasts. |
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[#37]
Anyone shoot 220 eldX out of 300wm?
I’d rather have the 200 or 212s, but haven’t been able to find any, so I grabbed some 220s. Would be used for elk |
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Signatures are stupid and annoying.
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[#38]
I've had really good results from H1000 and IMR7828SSC with 200gr Partitions and 212 ELDX. I want to try some H4831 with 180s at some point. IMR4350 didn't work as well for me and I don't have enough H4350 to do any development with it.
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[#39]
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[#40]
Almost a year later, finally broke out the 300wm again.
Loaded up a few rounds of 208gr AMAX, 250 primers, and winchester brass. loaded to 3.55" COAL H4350 - 63-67 grains IMR4831 - 64-68 grains H1000 - 73-77 grains Ramshot Magnum - 77-81 grains Didn't have a chrono and was just trying to get a feel for these powders. I made a couple rookie F ups with the H1000 loads (accidentally shot one in 'warm ups' with my factory ammo and loaded an unprimed case ), so it didn't get a fair shake, got me frustrated, and was the last of over 200 rounds (not all 300wm) fired today. I will say that 77 gr of H1000 recoiled the most and was a bit crunchy seating the bullet. It also was my worst group by far 1 3/4". The group at 75gr was 1". The h4350 did well, grouped nicely and pretty light recoil. But I think I'll take it out of the mix and save it for other cartridges (only have 8.5 lbs left!). The IMR 4831 got me my best group at 68gr...probably about 3/4". The RamMag at 81 grains got me good groups, and the best was the 81gr. All 3 powders other than H1000 got me my best groups at higher charge weights. Going forward, i'll focus on 1000, 4831, and Magnum... |
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Signatures are stupid and annoying.
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[#41]
Originally Posted By Techsan02: Do we have an 'official' 300 WM thread? If so, link? If not, can we? Seems like most preferred loads are with H1000 or H4350, both which are difficult to come by. Anyone using a different powder in their preferred load? Looks like SAAMI spec is 3.340 OAL...but tons of online sources show OALs well beyond that. Are people just pushing their luck, or is that actually a valid, safe thing to do? View Quote IMR 4350 user here. 165 grain or 180 grain Nosler Partition. |
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17 And that no man might buy or sell, save he that had the mark, or the name of the beast, or the number of his name.
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[#42]
WCC Case
190 SMK FGMM LR Primers IMR4350 69.3 grains Gave me 2900fps out of a 24" 5R barrel and was very accurate. This was my competition load (MTU) back in mid-2000s. There are more advanced/temp stable powders out there now, but they are also harder to find. |
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[#43]
Anyone loading up 300wm for elk or other big game this year?
I've got ELDx in the 178, 200, 212 and 220 variety, I need to settle in on one weight so I quit wasting primers/powder/$$$...I'm guessing all of them will do the job. |
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Signatures are stupid and annoying.
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[#44]
I'm surprised more are not using RL26. I guess that's due to availability of it?
Anyone load subs for 300 WM? |
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[#45]
Got myself an xbolt and loaded up a ladder test with 168gr barnes ttsx with H4831sc, I shot monday. Got what I think was probably a pressure sign at 79.9. 79.5 was fine. I also loaded out fairly long at 3.53 barnes load data says 3.360 at 79.9. Xbolts are limited on their magazine space- but I may push out further.
Big However- I'm pretty new to reloading. I'm going to play around with 78ish to 79ish grains next. My ladder test was pretty close to inconclusive however- It seemed that all my rounds at the higher end were really close. I didn't use my chrony but plan to next range session. Regardless, I should be in the 3050-3100 range all said an done. It's a hunting load so an 1inch at 100 is going to be gtg for me. |
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[Last Edit: GimpyPaw]
[#46]
My current load for this year:
300 Win Mag / Hammer Hunter 166 gr solid copper Sako Action, McMillan carbon fiber stock, glass bed. 26" 1:10 barrel, 2.75 lb trigger pull Case: Norma, once fired. Case prep: Annealed, flash hole and primer pocket uniformed. Trim to 2.610" Shoulder bump .002" in LE Wilson bushing die, .333 neck bushing Bullet: Hammer Hunter .308 166 gr solid copper Powder: Vihtavouri N560 77.72 gr Primer: Fed 215 M COAL: 3.553" Jump: didn’t check Velocity: 3211 fps Loaded a dummy at max length for magazine, checked to make sure it was off the lands. Used that for my seating depth and have been very happy with it. Probably the most accurate load I’ve fed into my rifle. Just dumb luck on a node I guess. My son’s load for this year: 300 win mag 180 gr Norma Bondstrike Sako AV 24" 1:10 barrel, 3 lb trigger pull Case: Norma, twice fired. Case prep: Annealed, flash hole and primer pocket uniformed. Trim to 2.610" Shoulder bump .002" in LE Wilson bushing die, .332 neck bushing Bullet: Bondstrike .308 180 gr Powder: Vihtavouri N560 74.10 gr Lee Factory Crimp, light crimp Primer: Fed 215 M COAL: 3.457" Jump: 0.13” Velocity: 2859 fps Moderate load, but accurate. The Bondstrike bullets are VERY sensitive to seating depth. I shot at least 60 rounds dialing in the node. |
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[Last Edit: uglygun]
[#47]
65 grns imr 4350 w 200grn smk loaded to kiss the lands.
Rem 700 PS liked it even though I had tons of freebore. Federal gold medal 190s shot for shit til I made my 190s seated like .200 further out. Edit. And 30 cal M2 at around 3200fps for Catalina Wine Mixers. |
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[#48]
I bought my Tikka T3x in 300WM last year in preparation for a doe elk hunt. I worked up the following load:
Winchester cases 1x fired CCI 250 primer IMR 4350 69.5 grains 180 grain Barnes TSX 2890 fps I was pretty discouraged at first because the best I was getting were 1.8" groups at 100 yards, using the book COAL of 3.340" I then read that Barnes bullets like to be seated deeper, so I took my Lee handpress out to the range with me and started seating the bullets deeper and shooting groups (3 shot groups all at 100 yards): 3.340" OAL = 1.83" average 3.325" OAL = 1.31" average 3.310" OAL = 0.65", 0.70" and 0.80" (3 different 3 shot groups) Attached File Attached File This group was shot at elevation (7500 feet) and at 400 yards to verify my dope chart Attached File At 2890 fps, that 3.310" OAL round dropped my doe elk at 440 yards. While she was on the ground I put another round into her just to be safe, but I think the first round would have done her in. Attached File I'm heading back out to NM this year for round 2 (Elk are delicious!). Also, anyone shooting Barnes bullets, seating them deeper has the potential to really tighten up the groups. I highly recommend this approach as I've good results doing this with other Barnes loads (7.62x39 in particular). |
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High Speed, Low Drag, Airtight, Teflon Coated Super Cracker
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[#49]
I launch 190 grain SMK's @ 2900 fps using RE-22. 200 grain old school SMK's @ 2800.
Remington 40-X single shot with a 27.5" barrel. RE-22 is a good powder in this caliber. |
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[#50]
I'm interested to know when you guys are loading "comparable" specs to factory ammo, is there any cost savings? I've always wanted a gun in 300WM as I like the ability to use all kinds of .30 projectiles which I usually have on hand. Several years ago I was hell bent on buying a Savage in 300 WM and then somehow ended up with an M82... I circled back around lately and it looks like factory 300 WM isn't much cheaper than 50 BMG.
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