The Firing Line Forums - View Single Post - .243 AR-10 Slow burning Powder issues? General issues with .243 AR10?

Natty270 · May 22, 2021, 01:04 PM

A friend is building a AR-10 .243 for me. Aero upper and lower, 22" custom Mcgowan barrel. I hand load for .243 bolt action with RL19 and IMR4831. Guy at the local reloading supply store advised I may have issues with having enough pressure to cycle the rounds properly due to the slower burning powders that I am currently using. Can anyone shed more light on issues that I may have to keep an eye on with my .243 build? Is this a common occurrence? Can I just load hotter rounds (closer to max, or max) or would I need to use a faster burning powder? Thanks in advance for your assistance.

May 22, 2021, 01:04 PM	#1
Natty270 Member Join Date: February 24, 2020 Location: Wisconsin Posts: 21	.243 AR-10 Slow burning Powder issues? General issues with .243 AR10? A friend is building a AR-10 .243 for me. Aero upper and lower, 22" custom Mcgowan barrel. I hand load for .243 bolt action with RL19 and IMR4831. Guy at the local reloading supply store advised I may have issues with having enough pressure to cycle the rounds properly due to the slower burning powders that I am currently using. Can anyone shed more light on issues that I may have to keep an eye on with my .243 build? Is this a common occurrence? Can I just load hotter rounds (closer to max, or max) or would I need to use a faster burning powder? Thanks in advance for your assistance. __________________ IN THE WIND HE'S STILL ALIVE Last edited by Natty270; May 22, 2021 at 01:35 PM.