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Posted: 10/16/2017 10:32:45 AM EDT
[#1]
In 300 blk I prefer Lil'Gun over H-110 for bullets over 135 grs.
I use the same case length of 1.360 as I like even numbers. I worked up to and settled on 15.0 grs Lil'Gun with a 147 gr FMJBT. Home formed RP 223 case, Magtech 7 1/2 primers. Remember "147 gr FMJBT" is a generic tern as there are so many manufacturers of this bullet, so be sure to work up carefully. Bullets and barrels can and do vary. Note the firearm used in the data and it's seldom an AR-15. That mean the OAL given is not correct for feed a 300 blk round from a 223 magazine. Use the .250 ogive method to determine OAL with your bullet. This method works with all ".308 bullets not designed for 300 blk" 180 grs and under. nder With my 147 gr bullet, OAL was 2.10. Discussion on .250 ogive method I hope you bullets are better than mine, I could only get 3 inch 100 yd groups. The 150 gr Hornady #3031 shoots much better. |
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Posted: 10/16/2017 12:12:39 PM EDT
[#2]
I was mistaken on primer I have to use. I'll be using the CCI 450 small rifle magnum primer. I have the CCI 400 and 41 on hand if I need to use that instead. Any help appreciated.
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Posted: 10/16/2017 12:16:39 PM EDT
[#3]
Thanks for your help. I'm still fuzzy on the ogive method but will not proceed until I'm clearly understanding it.
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Posted: 10/16/2017 12:35:32 PM EDT
[#4]
Please bare with me as I want to see if I'm understanding this.
The "ogive" is the section of the bullet that extends in the curved section from the tip to the leading edge of the bearing surface on the bullet? And the .250" mark on the ogive is ideally in line with the magazine rub as to allow the new 300 cartridge/bullet to feed as a normal .223 rd? Basically duplicating the critical dimensions of the .223 rd necessary to feed properly. Once the ogive mark is inline with rib on magazine that is where bullet is seated to giving you the COAL? I'm asking these statements in a question form to ask if I'm understanding the .250 ogive method correctly. Thanks a lot. |
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Posted: 10/16/2017 2:42:37 PM EDT
[#5]
If I'm doing the ogive method correctly then my COAL is 2.095
That places my lines that I marked on bullet at the .250" diameter of ogive section right at edge of magazine rib. Thanks |
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Posted: 10/16/2017 2:44:19 PM EDT
[#6]
If I'm doing the ogive method correctly then my COAL is 2.095
That places my lines that I marked on bullet at the .250" diameter of ogive section right at edge of magazine rib. Thanks |
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Posted: 10/16/2017 11:11:30 PM EDT
[#7]
Quote HistoryQuoted:
Please bare with me as I want to see if I'm understanding this. The "ogive" is the section of the bullet that extends in the curved section from the tip to the leading edge of the bearing surface on the bullet? And the .250" mark on the ogive is ideally in line with the magazine rub as to allow the new 300 cartridge/bullet to feed as a normal .223 rd? Basically duplicating the critical dimensions of the .223 rd necessary to feed properly. Once the ogive mark is inline with rib on magazine that is where bullet is seated to giving you the COAL? I'm asking these statements in a question form to ask if I'm understanding the .250 ogive method correctly. Thanks a lot. |
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Posted: 10/16/2017 11:15:13 PM EDT
[#8]
Quote HistoryQuoted:
If I'm doing the ogive method correctly then my COAL is 2.095 That places my lines that I marked on bullet at the .250" diameter of ogive section right at edge of magazine rib. Thanks My OAL was 2.1, the small amount of difference is probably a slightly different ogive with your bullets, from the ones I have. Good job learning a new technique. 
Let us know how they shoot. |
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Posted: 10/17/2017 7:45:53 AM EDT
[#9]
Thank you so much dryflash. I will start my loading this morning. I am hoping to find out what you think about crimping and if you do then just how much?
I'm using RCBS FL Die Set #22401 If I'm understanding the directions it states this seating die has a "tapered " crimp ability if one desires to crimp. Thanks ahead once again. I know this is a different topic but I've been reading up on your other stuff and I value your opinion. |
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Posted: 10/17/2017 8:02:08 AM EDT
[#10]
Crimping is not needed in the AR platform if neck tension is correct.
However I have found a moderate crimp to aid accuracy in 300 blk. Be sure to not overcrimp. I always crimp in a separate crimp die for two reasons. 1) Standard seat/crimp die is seating the last bit and crimping at the same time. 2) They are a PITA to adjust. I use a Lee FCD, factory crimp die. It's very easy to adjust how much crimp is given. |
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Posted: 10/17/2017 8:33:13 AM EDT
[#11]
I've only loaded 10 rds this morning since last post. I was trying to get a very light crimp and get seated properly too. I agree on the aggregation part for sure.
I will adjust crimp back out of process and only seat bullet for now. The bulk 147 gr bullets are extremely inconsistent as far as their lengths go. I'm concerned about seating into my powder. I had adjusted the seating depth to 2.110" just to reduce risk of bullet seating into powder. I don't know enough about that issue to take any chances, I wonder how much can I raise bullet out of seat without hurting performance? Thanks again. |
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Posted: 10/17/2017 10:38:14 AM EDT
[#12]
Quote HistoryQuoted:
I've only loaded 10 rds this morning since last post. I was trying to get a very light crimp and get seated properly too. I agree on the aggregation part for sure. I will adjust crimp back out of process and only seat bullet for now. You can seat without crimp, then adjust seater stem high and then adjust die to crimp only. Much of this and you will get a crimp die. The bulk 147 gr bullets are extremely inconsistent as far as their lengths go. I'm concerned about seating into my powder. I had adjusted the seating depth to 2.110" just to reduce risk of bullet seating into powder. I don't know enough about that issue to take any chances, Remember your seating die is contacting the ogive. So the OAL can vary, but the point the ogive is set at won't vary. This is what is important. Any published load will not be affected if the bullet contacts the powder. That's a non issue. It's possible to have a compressed (powder) load with certain powders. Happens in many calibers rifle and pistol. I wonder how much can I raise bullet out of seat without hurting performance? See above and forget doing this. Thanks again. |
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Posted: 10/17/2017 11:09:39 PM EDT
[#13]
I use 15gr seated to the cannelure for plinkers with that bullet.
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Posted: 10/18/2017 2:26:12 AM EDT
[#14]
I have used some M80 pulled 147 Grain bullets and while they shot, they were not exactly accurate. I ran them through both a short 8.5 in barrel with and without suppressor and a 16 in barrel. The load info for supersonic rounds was 16.5 grains of H Lil' Gun loaded to 2.15 oal. As others have said the M80 pulled bullets aren't very consistent on both length and weight. However, for a 16 inch gun to plink they are more than effective, by that I mean I can shoot my steel silhouette at 100 yards all day long. I gave up on trying to truly see how accurate they were when I was sighting in my scope, I was happy then with 5 shots inside a 2 inch group at 50 yards. For the subsonics, I loaded it with 8.5 grains on H Lil' Gun, it too was inaccurate but fun to shoot and cheap!
All the load data I used for the 147 Gr, I transferred directly to my Sierra Matchking BTHP 150 grain bullets. Now those are going to be a kick butt deer round out of my 16 inch gun. |
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Posted: 10/22/2017 12:53:21 PM EDT
[#15]
Thanks for your input. When you tried the 8.5gr , did you try it in your 8.5” barreled gun too? If so did it cycle ?
I tried 8 then 9gr yesterday and it actually shot better but no cycling. The cases were sooty too. But is was very cool to NOT hear the loud blast. Thanks |
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Posted: 10/22/2017 2:57:58 PM EDT
[#16]
I'm also using 15gr Lil-gun with the Hornady 150gr flat base soft points. Accuracy is very good. Personally I'd call it excellent considering that its an inexpensive upper.
I'm using CCI-400s. No problems. Motor |
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Posted: 10/22/2017 3:04:31 PM EDT
[#17]
smitters. Will the BO push those Sierra 150gr BTHP fast enough to be effective?
I love the way my rifle shoots the 150gr Hornady SP but when I get around to loading a deer round I'm going with the 125gr SST with canalure. Motor |
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Posted: 10/22/2017 7:24:36 PM EDT
[#18]
Quote HistoryQuoted:
smitters. Will the BO push those Sierra 150gr BTHP fast enough to be effective? I love the way my rifle shoots the 150gr Hornady SP but when I get around to loading a deer round I'm going with the 125gr SST with canalure. Motor 110-135 are where its at in .300 IMO |
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Posted: 10/22/2017 9:36:45 PM EDT
[#19]
I have a 10.5 inch 300BLK pistol
The load I developed Hornady 150gn FMJBT LC Brass OAL 2.085 Lil Gun 15.6 gn Primer CCI 400 1825 FPS Average from 5 shots Loaded up 5 rounds each at 14.6, 15.1, 15.6, 16.1 Bench rest at 25 yards using 512 Eotec As alway start low and work your way up 25 yard target shooting the 15.6 gn  Attached File |
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