Ringman, you CAN, get the XP100, in a 6BR, the extra short butt
I've shot blackbirds offhand at 100 yds w/22.....busted milk jugs at 150 with a 4" 629 using irons......
YET - yes I did miss a nice Tx Buck about 150 in a gusty as hell wind having to shoot offhand w/a M7.
Crazy, hit a I've hit a coke can first shot at about 130 yds with a 30/30 contender and 2x, guess sometimes you get lucky....made a lot of lucky hits in my day, missed a few as well. Thankfully wounded VERY few.
Minimum weight depends on many things, balance, trigger/locktime, scope power, etc. not to mention the shooter.
One thing is certain, there may not be any formula as no one size fits all, but weight, like fit and balance and other variables do affect shootability.
