i have always been a bolt type of guy but i needed to try something diff. so i have a Bushmaster W/target barrel 24"(wanted 26" but they dont carry it anymore)1/9twist,coming in tommarow,i have been told that .75" is about all i should expect,this worrys me a bit,i am used to .5" and under,i  would like to get to .65"anyway, is this possible or did i expect something i cant get?i load for all my bolts and have been able to get them undr .5" with a little gunsmithing and good reloads, i would be greatfull for any help, would anyone have a suggestion for a good AR book on setting one up? songdog

Try posting in in the "Competition Shooting and the Accurate AR" forum.