Did you have any accuracy issues with your 303? What bullets did you use? I ask because of the bore diameter. JB reports that it's 0.313 inches.
Oddly enough, one of the better grouping bullets in my 303 Ruger is a .308 Hornady 220 gr. RN, and I've tried it several times just to rule it that it might be a fluke.
The only bullet that it does not like is a Barnes, all others work very well it seems.
