I recently purchased an rpr in 243 and was wondering what store bought ammo I should try to start out with? I will only be shooting out to 300 yards max and would mostly be doing paper at 100-200 yards.this is the first riffle in 243 I've owned. I wanted the 6.5 creedmoor but could not find one close to me. I will probably re barrel to that caliber later.(after I shoot out this one)so no hand loads this riffle comes with a 1 in 7.7 twist and a 26" barrel. will 100gr. be ok? what would be ok for what I want to shoot? Ill be doing mostly bench type and some prone shooting (front rest and rear sand bag)or on bi-pod. I dont know anything about this round other than everybody trying to tell me it's not as good as the 6.5 creedmoor,its what I have and I'm going with it.thank you for any help and opinions you have.