I'm using the Remington 700P in .308. http://www.remingtonle.com/rifles/700p.htm

it is a heavy barrel. Whole dang rifle is heavy!

Load is once fired FGMM brass, Winchester primers, 168gr Sierra Matchking bullets, over 43.2gr of IMR 4064. COAL is 2.877.

Once the barrel is warm, this rifle/load will shoot clover leaves - or better - at 200 yards all day long.

Let me see if I can find some .224 match quality bullets. If I can pull together match level ammo for that gun, I would love to do a comparison test. Heck, I would also like to get my hands on another Remmy 700 heavy barrel to test also.

. . . I guess my next obsession is going to be exploring cold bore variations. I'm bad that way, as you know.