FuzzyGeff, you're into Weatherby... I bought you some ammo (one round) you buy the gun!
165gr bullet zipping along at 3,500 feet per second. That's got some "thump!"
In GURPS terms that seems to come to 9d+2 pi and 1,260/5,500 for range. Rcl has to be in the 6-8 range!