ShrpShooterSer

HI I have shot more than 400 rounds total of these two through my CZ527 with 600 mm bull barrel - 1:8, chromed (aftermarket), which has enormous freebore - with 65 mm coal and tmk still not touching the lands. Still cant get it to shoot .3, only occasionally I get .5 groups at 300 meters. I use cci400 and n140 as power charge. Cant even remember what I tried. Can it be that so much freebore is giving me a hard time to achieve better results? Should I try to minimize jump, or to increase it to the max (I ve read it somewhere?) Any thoughts?

I am awaiting on one of the same Sabati TLD in September. At the moment I shoot a custom made 47L on Mauser action, and chamber was cut with PTG .169 freebore reamer - I have 0.09 mm clearance. 1 or 2 thou sounds fantastic (approx 0.025 - 0.05 mm). If you chamber ok, then no worries. I hope mine will be like that.