Thread: Marlin 7mm08

Have a marlin7mm08 and she shoots like shit @100yds with hornady factory ammo. How can you tell the rifling in barrel is gone. Also was thinking or cutting her down to bushpig style with dan hardy and sighting it for 50yds as this is as far as it gets wherei go hunting in the roar will this efect the accuracy even more??? Cheers guys