ernierod1 Posted September 5, 2012 Share Posted September 5, 2012 Have a AR-10 Armalite-20" bbl-SS Bull bbl config.-1:8" twist.Am starting to develope accuracy loads for rifle using 139-142 gr bullets.I have the following powders-4064,4350,4831,RL19 and N150. Can anyone suggest a powder that I may try first to test for accuracy.Thanks for help Link to comment Share on other sites More sharing options...
BrianATL Posted September 5, 2012 Share Posted September 5, 2012 4350 works for most everybody Link to comment Share on other sites More sharing options...
Tom Freeman Posted September 5, 2012 Share Posted September 5, 2012 I rebarreled my OBR to 260 last year. While the 139/142s are a good bullet, in a gas gun the bullet eats up too much powder space. I have had better luck with 123s and H4350. Link to comment Share on other sites More sharing options...
MarkCO Posted September 5, 2012 Share Posted September 5, 2012 (edited) I found the same thing as Tom, even using different powders. 107-130 gave the best results in the gas guns. I used H4350 as well as Ramshot Hunter and H4831SC. There is some load data here with the Hunter and 4831SC if you are interested. Edited September 5, 2012 by MarkCO Link to comment Share on other sites More sharing options...
ernierod1 Posted September 7, 2012 Author Share Posted September 7, 2012 Have a AR-10 Armalite-22" bbl-SS Bull bbl config.-1:8" twist,according to Armalite SS bbl was hand lapped three times. Am starting to develope accuracy loads for rifle using 139-142 gr bullets.I have the following powders-4064,4350,4831,RL19,H414 and N150. Can anyone suggest a powder that I may try first to test for accuracy.I am hoping for 1/2" accuracy at 100 yards.Thanks for help Link to comment Share on other sites More sharing options...
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