Kyodee257 ,Welcome to the "TC Contender/Encore Addict Support Group". Here's my 1.5 cents, look seriously at ANY of the already talked about calibers for sure. But having had many lengths of TC's from 8"to18" in many diameters, I have settled on 12" as an ideal compromise. Even better(for me)in the traditional handgun rounds like .357mag/max,41,44&45. The barrel diameter & forearm screw spacing is the same as the S14's. Balance is still quite good for offhand or field rest shots. Velocity of these rounds are great. I have taken PA woodchucks & crows w/ my newest 12" .22LR to Lazered 130yrds, shooting HE segmenting , Win new powerpoints or CCI Velocitor ammo. I think that 30-30 ,35Rems& 7-30's do best in S14 length. If you are or become like the most of us(and your wallet allows) you will try all that you might come across as you bump along this trail.