Shot a lot of BARs, never had one that I could not get well under MOA to 500 yards, usually with factory fodder. I never hot loaded for a BAR, never saw the point. Thing I always like about the BAR is they actually came in LH.
My dad has a BAR that usually shoots sub moa or better. It doesn't like to be hot as groups open up quickly after 6-8 shots but that first group is usually solid with decent ammo. His is a 300 win mag.
I shoot a first production year BAR my grandfather left me in 243 Win. It has always shot sub-MOA with everything but 105gr and 55gr bullets. 70-100gr shoots great. The barrel twist is the problem there, not anything else. It will shoot factory Win Silvertip 95gr into tiny groups.
My father-in-law shoots an early 80s BAR in 300 WM. That rifle is also a sub MOA shooter and it’s never shot anything other than 150gr and 180gr Federal/Remington/Winchester cheap stuff.
Lots of great info guys, 300D, I had always thought of the BAR as a gun for the 7mm/300WM type rounds but hat .243 must be a very nice gun to shoot. Maybe a great brush country coyote gun, hmmm. Thanks all. MT