Okay, I cry uncle regarding ever considering enlarging bore-size to a shoulder-busting .30 caliber. A .243 Winchester has always served well downrange, but as I get older a .308 Winchester seems more a ball-busted at up to 400 yards that I could possibly handle. RECOIL difference: about 13 ft/lbs against 19 ft/lbs. I plan to not exceed 165 grain bullets @ 2800 fps. A far cry from my .243 105 grain screamers of 3100 fps. Slow Velocity vs Massive Bullet Blob. Am I growing up or growing old? Cliffy