I was wondering what load did you end up with for thw best accuracy? I'm finally fixing to start loading some 160g powder coated Lee C309-160-R.I have a lot of IMR 4227 and it works well in the 300BO.16 gr is where I started.
Jon
I finally tried the bullets and with 160g, 16.2g 4227, they worked great. Using a pistol AR 300 blackout with 10.5" barrel, first shooting at 25yrds, will try maybe 50yrds next. Have two of the blackouts, these were build for home defense.stlg67,
I tried loading down to 14gr of 4227 and worked up to 16 gr. It cycled the rifle and was accurate out to 200 yards. Using a 12 inch steel gong as my target. 16 gr was my end load.
Jon