I had a few contender barrels that were shooters, though none were factory tubes. 10" bullberry 218 mashburn bee. It took a suprising amount of load work to find an moa combination. When I did, I could consistantly hit the head on the turkey silouette at 150 yds. 20 shots, 20 hits.
Does that put the contender and encore rifles on par with what good boltguns do? There are boltguns that will print 5 shot 1/2" ctc groups at 200 yds.
