User Panel
User Panel
User Panel
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Posted: 9/25/2020 10:32:04 AM EDT
[#1]
11gr A1680
Rem 7-1/2 COAL = 2.005 1/2 crimp |
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Posted: 9/25/2020 11:24:24 AM EDT
[#2]
Might have issues cycling. It's hit or miss with my 11.5"
Check out this thread also: https://www.ar15.com/forums/armory/300-Blackout-Master-Thread/42-385765/ |
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Posted: 9/25/2020 11:41:01 AM EDT
[#3]
Interested as well, are heavies preferred for subsonic rounds to cycle?
Anyone use AA #9 in the .300 BO? I'm going to be using a 9" barrel, pistol length gas, and shooting suppressed. New to the .300 BO so any "been there done that" tips are appreciated. I kind of hate to read 65 pages lol. |
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Posted: 9/25/2020 1:21:38 PM EDT
[#4]
https://www.ar15.com/forums/Armory/300-Blackout-Master-Thread/42-385765/
It won’t hurt you to read 65 pages. 
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Posted: 9/25/2020 3:32:08 PM EDT
[#5]
Quote HistoryQuoted: Interested as well, are heavies preferred for subsonic rounds to cycle? Anyone use AA #9 in the .300 BO? I'm going to be using a 9" barrel, pistol length gas, and shooting suppressed. New to the .300 BO so any "been there done that" tips are appreciated. I kind of hate to read 65 pages lol. I have used AA #9. Again spotty operation suppressed or not. Out of an 11.5" pistol length. 180 I can typically get to cycle fine. |
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Posted: 9/28/2020 9:05:02 PM EDT
[#6]
Quote HistoryQuoted: 11gr A1680 Rem 7-1/2 COAL = 2.005 1/2 crimp I use 10.6gr of 1680 with 208gr A max bullets from my 8" suppressed gun. Not sure what his bbl length is but I'm thinking 150gr bullets will be above subsonic with 11gr of 1680. Rem 7.5 COAL 2.200" Light crimp with the Lee crimp die. ETA, I get right at 1010fps with this load. |
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