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10/30/2020 2:42:12 PM
300 Blackout Master Thread (Page 65 of 65)
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Link Posted: 8/8/2020 4:22:17 PM EST
If you have reloading equipment, but want to skip the brass-forming step, I got 500 pieces of already-formed, and primed brass for 21.6 cents per case from this website:

https://www.brassmonkeycc.com/product-page/300-aac-blk-10k-pcs

Trimming, forming, chamfering, annealing, and priming is probably all great fun if you have the time and motivation.

I was concerned that the product received would be questionable somehow - such as too-thick necks. Everything looks really good. Necks are 0.008" thickness - which is same as the necks on Winchester white box 300BO.

I ordered a second bag of 500 after receiving the first bag this week.

Range-testing it Wednesday.
Link Posted: 8/8/2020 8:48:05 PM EST
Link Posted: 8/12/2020 7:36:35 PM EST
[Last Edit: 8/12/2020 7:54:24 PM EST by W_E_G]
Quick range report for the Brassmonkeyz Lake City 300 Blackout brass.
Remember this is 5.56 brass that has been cut down and sized for 300 Blackout.
Headstamps were 17 and 18.

I fired about 50 pieces today.
No problems with the brass whatsoever.

There has been discussion about use of H-110 powder, and the pressures that can happen when it gets near a MAXIMUM load.
I think I gave that a pretty good test today.
I was trying to come up with a good load using H-110 and the common "M80" 150-grain FMJ bullet.

I ran several of those bullets with 17.0 grains H-110 -- which is expectedly fairly warm load according to Quickload.
I think its actually a good bit hotter than Quickload predicts.
My gun is an 8" barrel wearing a 9" suppressor.
Quickload says this load in an 8" gun should deliver around 1722 fps at a pressure of 53,664

I got an average velocity of 1899 fps, and some pretty healthy marks on the brass.
Biggest mark was from the ejector hole - causing a significant burr on the spent case.
Apologies for the weird coloration of the pic. I had to tweak a lot of the settings on the iphone pic to get the marks to show up. Remember the gun was running a suppressor, so the cases are really filthy. Until I adjusted the color/contrast the main thing that jumped out at the viewer was the DIRTINESS of the cases.
There is a fair bite too from the extractor, but not anything that would have given me heartburn if that were the only mark.
The ejector-hole mark is exessive. I intend to back this load down one full grain, and see if the issue with the ejector-hole mark resolves.

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Link Posted: 8/12/2020 7:51:51 PM EST
[Last Edit: 8/12/2020 7:52:52 PM EST by W_E_G]
I should mention that I fired the same M80-bullet/17.0-H110-charge in WINCHESTER cases, and I got no burr or mark worthy of photographing.

I weighed the H20 capacity of the Lake City and the Winchester (and Starline for that matter).
Each comes out to somewhere in the neighborhood of 23.5 to 23.9 grains H20.
I suck at measuring H20 in cases, so I make no representations of the consistency or quality of my water weighing.

I did notice that the 17.0 grains H-110 did cause the extractor to put a visible bend in the rim of the case.
I can never get the bent rims to show up properly in an iphone pic.
All I've got for you is this pic that sort of shows the "chomp" that the extractor put into the rim.

The bend is something to be concerned about.
It is more visible TO THE EYE when viewed from the headstamp side of the case - but that won't show up for me in a pic.
I don't think this pic really shows it sufficiently, but here it is anyway.

Attachment Attached File
Link Posted: 8/12/2020 7:56:03 PM EST
So, long story short, H-110 will tell you when you are using too much of it.

17.0 grains with a 150-grain bullet is too much in my gun.
Link Posted: 8/12/2020 10:57:34 PM EST
Link Posted: 8/13/2020 4:27:45 AM EST
[Last Edit: 8/13/2020 4:33:51 AM EST by truedef]
I've never reloaded, but have been doing a lot of studying while I am overseas.

I've watched this video a few times and thought I would share, I speed the playback up to 1.25x as its slow.

Failed To Load Title


Originally Posted By W_E_G:
If you have reloading equipment, but want to skip the brass-forming step, I got 500 pieces of already-formed, and primed brass for 21.6 cents per case from this website:

https://www.brassmonkeycc.com/product-page/300-aac-blk-10k-pcs

Trimming, forming, chamfering, annealing, and priming is probably all great fun if you have the time and motivation.

I was concerned that the product received would be questionable somehow - such as too-thick necks. Everything looks really good. Necks are 0.008" thickness - which is same as the necks on Winchester white box 300BO.

I ordered a second bag of 500 after receiving the first bag this week.

Range-testing it Wednesday.
View Quote


I saw you share this a week or so ago and ordered 500. Couldn't pass it up as primers are unobtainable and its ready to go. The only thing I am missing is a tumbler and media at the moment. I managed to scoop everything else up so these 500 cases will get me started nicely.

Thanks for sharing.
Link Posted: 8/13/2020 8:50:33 AM EST
Right on Blackout Bro!
Link Posted: 8/13/2020 6:18:07 PM EST
I've been working on a SUB-SONIC load for the M80 bullet.

I really like the CFE/BLK powder for 200-grain subsonics. Truly the ideal powder for the 200-grain bullets because of loading density.

Anyhow, I decided to pull a load out of my ass (with the help of Quickload) to try to come up with a "plinking" load for the M80 bullets.
I shot several rounds of my made-up load yesterday over the chronograph.
Loading density is less than ideal (~76%). But everything functioned just fine in the 8" Palmetto upper.
Velocity was lower than I had hoped, but I didn't miss it by too much. I'd prefer velocity to be around 1050 fps.
I did not shoot for accuracy. I can only vouch that the load shoots minute-of-not-hitting-the-chronograph.
I think I'll try 14.0 grains next time.
And its no big deal if a few rounds in a lot go supersonic. Main reason for this load is to just have a (mostly) subsonic plinking load using a less-expensive, and (formerly) widely-available bullet.
The bona-fide subsonic loads out of this gun are still "noisy," even though they aren't loud. All the clatter of the bolt operating is pretty significant compared to a bolt gun or such.

Anyhow, here's the Quickload screenshot, and the load data I used, and the record/average of yesterday's chronograph work.

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Link Posted: 8/15/2020 5:02:52 PM EST
[Last Edit: 8/15/2020 9:58:39 PM EST by dryflash3]
Lehigh Defense has 194-grain subsonic projos in stock

https://www.lehighdefense.com/all/308-maximum-expansion-194gr-subsonic-bullet

Not inexpensive.

@W_E_G
In the future please post this kind of info in the tacked "where to find" thread at the top of the page. dryflash3
Link Posted: 8/16/2020 7:31:27 PM EST
So I've been slowing preparing to load 300 Blackout for the first time. I will be using some balm 200 grain bullets from Midway. Using the .250 ogive method, but I'm thinking it will be too short. They are at 2.04 OAL. Never loaded something like this before. I've loaded some photos of how it looks. The small scratch on the bullet shows where it measures .250.




Also I have N110, CFEBLK, and Lil Gun. Which should I try to work up load with first for subs.
Link Posted: 8/16/2020 7:52:15 PM EST
For subs I use lil gun, but I'm loading up 245s and not 200s.  I'd bet it would work fine, though.  As far as bullet length goes, I've loaded as short as 2.032 with some 150s before and they fed ok after I opened to the feed ramps a touch with a Dremel.  Their profile was a bit less pointy than those, however, so yours might load fine without the need to mess with the ramps
Link Posted: 8/16/2020 10:29:51 PM EST
Link Posted: 8/17/2020 7:44:36 PM EST
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By dryflash3:
First pic is GTG, second pic OAL is too short, may not feed.

Remember .250 to the center of the bump.


View Quote



Thanks, I corrected it. Loaded only four rounds today with different charge weights to test for function. I noticed load data says a max of 8.2 of Lil Gun but people load up to 8.5 grains. I loaded one each at 7.4, 7.7, 8, and 8.2 to try out.
Link Posted: 10/31/2020 2:42:12 PM EST
I can not find anything specific for loading 200 grain ELD-X for 300 blackout. Looking for a SUBSONIC load really using A1680 and CFEblk. Any info you kind gents would be great. I will be shooting out of ar platform with 8" barrel.  Thanks for the help.
Link Posted: 10/31/2020 6:55:47 PM EST
[Last Edit: 10/31/2020 6:57:57 PM EST by W_E_G]
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By T-RoyJenkins:
I can not find anything specific for loading 200 grain ELD-X for 300 blackout. Looking for a SUBSONIC load really using A1680 and CFEblk. Any info you kind gents would be great. I will be shooting out of ar platform with 8" barrel.  Thanks for the help.
View Quote


See

https://www.falfiles.com/threads/range-report-300-blk-and-308-subs-and-supers.452059/

And see

https://www.falfiles.com/threads/300-blackout-i-took-the-day-off-from-pre-death-confinement-for-“exercise”-today.451803/


Link Posted: 11/1/2020 9:13:14 AM EST
I purchased some Gallant powder coated 240 gr bullets last year. Can anyone point me to a starting point for these. Traditionally I have used A1680 for my subs. Shooting an 8" barrel with a can.

TIA
Link Posted: 11/22/2020 3:45:42 PM EST
Anyone have any data for CFE BLK with Hornady 150gr FMJ for plinking rounds

Went off the 150gr Hornady IB round info but want to double check
Link Posted: 11/22/2020 3:53:10 PM EST
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By derek1387:
Anyone have any data for CFE BLK with Hornady 150gr FMJ for plinking rounds

Went off the 150gr Hornady IB round info but want to double check
View Quote



100% full case (17.3 grains) will give you about 1360 FPS and around 34,000 PSI pressure.

The best use for CFE-BLK in 300BLK is for subsonics, but it will certainly work with the load I mentioned.

From my 8-inch barrel gun, I get 1000-1050 fps with 12.3 grains and the 145-150 grain bullets.
Link Posted: 11/22/2020 4:34:35 PM EST
[Last Edit: 11/22/2020 4:39:01 PM EST by derek1387]
Wow.

So the IB info is waaaay off then....

Looking at the Barnes 150gr FMJ at 18.8gr is 1800fps with the same powder

Guess I need to take down those bullets....
Link Posted: 11/23/2020 9:35:14 AM EST
[Last Edit: 11/23/2020 9:36:40 AM EST by W_E_G]
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By derek1387:
Wow.

So the IB info is waaaay off then....

Looking at the Barnes 150gr FMJ at 18.8gr is 1800fps with the same powder

Guess I need to take down those bullets....
View Quote



Where you getting those numbers?

Something published somewhere ore your actual testing?

Lots of manufacturers published velocity numbers use a longer barrel than my 8-incher.
Link Posted: 11/23/2020 10:14:06 AM EST
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By W_E_G:



100% full case (17.3 grains) will give you about 1360 FPS and around 34,000 PSI pressure.

The best use for CFE-BLK in 300BLK is for subsonics, but it will certainly work with the load I mentioned.

From my 8-inch barrel gun, I get 1000-1050 fps with 12.3 grains and the 145-150 grain bullets.
View Quote

So no problem cycling the 150 running them as subs?  I run 8.5" so it certainly should be close.
Link Posted: 11/23/2020 10:41:59 AM EST
[Last Edit: 11/23/2020 10:57:06 AM EST by W_E_G]
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By Dogue:

So no problem cycling the 150 running them as subs?  I run 8.5" so it certainly should be close.
View Quote



The 150's run 100% as subs in my 8.5" Palmetto upper. Standard (3.0 ounce) carbine buffer and standard carbine buffer-spring.
Built on this "kit" https://palmettostatearmory.com/psa-8-5-pistol-length-300aac-blackout-1-8-phosphate-7-lightweight-m-lok-classic-shockwave-pistol-kit-5165449142.html

That Palmetto upper is amazing as far as what it will run. With or without a suppressor. Its fucking loud and bright with supers and no suppressor.
I've shot at least a dozen loads, running the gamut of powders and bullet-weights, in it. The ONLY load that didn't cycle in it was TRAIL BOSS. The gun is literally BB-Gun quiet with a full case of Trail Boss, but only gets the 150's out at around 900-950 fps.

I have a good supply of the surplus 145-150 bullets, so I played around with them to see what would work. Everything worked.
H-110, both of the IMR pistol powders, AA1680, CFE-BLK. And Trail Boss as noted.
I may load a few with medium-burning rifle powder just to see what happens. Something like VARGET or TAC.
Quickload says a full case of VARGET should make 1100 FPS with the 150-grain. I bet it cycles the gun - and big muzzle flash, because Quckload predicts ony 50% burn out of the 8.5" barrel. Probably want to be careful with those sorts of loads if you are using a suppressor. Might fill up the suppressor with unburnt powder - until the accumulation DOES burn, and does bad shit to your suppressor.

The 150's aren't the "best" bullet for 300BLK, but they sure as hell cycle the gun and kill shit. Go for lung shots if you're shooting deer with FMJ's. Absolutely NOTHING goes far with a through-and-through hole in the lung. Something about ability-to-breathe as being necessary for living. Collapsed lung is not helpful in that regard. Even just an entry with a BB-gun (city deer) makes 'em DRT with lung shots. They don't even act like they've been shot until they just pass out and fall over.

I can't promise you a subsonic bullet won't bounce off the skull of a deer. I've seen FMJ 9mm bullets at hello-front-door distance bounce off the skull of humans (actually enter the skin in the front, and exit the skin in the back - without penetrating bone - two band-aids for treatement - I shit you not). So, there's that. Go for the lung shot.
Link Posted: 11/23/2020 3:38:31 PM EST
Good info...and we're running almost identical BO's.
Link Posted: Yesterday 11:28:02 AM EST
[Last Edit: Yesterday 11:36:33 AM EST by compuvette]
I’ve got a bunch of PRVI 174gr FMJ’s that I’m going to try with 300blk for subs.  Sierra lists Reloder-7 as a capable Subsonic powder with their 175’s and has load data printed.  Anybody try it?

ETA - the Sierra data is 11.2gr of RL-7 for 1050fps from a 16" barrel with a 175gr HPBT or TMK.  11.4gr of H4198 or 11.3gr of IMR 4198 are also listed for subs with the 175's.  I'll be using a 9" AAC and a 8" Seekins, both 1/7 twist with cans.
Link Posted: Yesterday 3:51:32 PM EST
I dialed in a load for 147 grn subs.  I set the oal at 2.050. This seats the bullet with the cannelure at the case neck.  I tried the 13.3 grns of CFE black.  It was 1160 fps.  I dialed it all the way back to 10.8 grns.  Bolt would not lock back at 10.6.  Im getting 800 fps with 10.8.  Its quiet and shoots to point of aim.
Link Posted: Yesterday 9:58:47 PM EST
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By chucku:
I dialed in a load for 147 grn subs.  I set the oal at 2.050. This seats the bullet with the cannelure at the case neck.  I tried the 13.3 grns of CFE black.  It was 1160 fps.  I dialed it all the way back to 10.8 grns.  Bolt would not lock back at 10.6.  Im getting 800 fps with 10.8.  Its quiet and shoots to point of aim.
View Quote


Darn it.  This thread is going to make my try 147 subs.  My LGS has some CFE black still on the shelf......
Link Posted: Yesterday 11:56:16 PM EST
[Last Edit: Today 12:57:34 AM EST by dryflash3]
BUY!... BUY!!!

Please leave the memes and such in GD. dryflash3
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