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Posted: 6/28/2015 11:12:16 AM EDT
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Yesterday, I loaded 20 300 blackouts with some 150 grain Winchester RN pulled bullets from some 30-30 shells that were given to me. The loads were heavily compressed. I started at 16.5 grains which filled to the bottom of the neck. 17.7 was nearly full. I backed down to 17.3. To get to the length needed per the master thread instructions, it was very heavily compressed I have never dealt with compressing a powder this much before. First time loading blackout and first experience with 4227.
Any thoughts would be great. Thanks |
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I had a related problem last year. Here is a thread I created: https://www.ar15.com/archive/topic.html?b=6&f=42&t=426770
Essentially, I would recommend using Hornady's data for 150's.. Sounds like you are using Hodgdon's. Also, have you verified these rounds feed ok? AR? The Hodgdon 150 SP's fed fine but I never got the accuracy I wanted. I sold them and went to 150 FMJ. Good luck! |
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Quoted:
I had a related problem last year. Here is a thread I created: https://www.ar15.com/archive/topic.html?b=6&f=42&t=426770 Essentially, I would recommend using Hornady's data for 150's.. Sounds like you are using Hodgdon's. Also, have you verified these rounds feed ok? AR? The Hodgdon 150 SP's fed fine but I never got the accuracy I wanted. I sold them and went to 150 FMJ. Good luck! Feed ok. I did use Hodgdon's data. I am thinking I might scrap this idea and stick to a different profile bullet. There is a lot of room in the magazine, and the next rounds would get bumped ahead quite a ways, causing damage to the bullet as well. Posted Via AR15.Com Mobile |
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Wow - I looked at that thread. It sounds like I might be considerably over. Especially with having to seat them so deep. I think I am going to just wait until I can order some fmj or use some Speer hot cor bullets that I have for the .30-06. Still have to get an optic so in no hurry. Posted Via AR15.Com Mobile |
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Compressed loads with 4227 are pretty normal. Even up to 120% fill. BUT if you aren't sure DON'T shoot them.
That little voice in your head is usually right. It doesn't sound like you are using the ideal projectile or data that is ideal for the projectile you have. |
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I'm using IMR 4227 with (2) loads:
16 grains with a Speer TNT 125 gr bullet. Seating them to about 2.220" 10 grains with Sierra MK HPBT 220 gr bullets. Seating them to max 2.260" Both those are very close to compressed but not. I started at 17 grains for my supersonic loads and those were compressed. I backed it down because I don't need the velocity for plinking. |
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