I primarily use a sportered M38 6.5X55 Swede when I use a Milsurp, but have shot deer with my Carcano 6.5 carbine, Norwegian Krag carbine 6.5, AG42B 6.5 semi, M44 carbine, M-1 Garand, No1 and 4 Lee Enfield 303's and last but not least 7X57 Spanish short rifle. I like them all and they all knock deer down just great, but the accuracy king of the whole lot is those good 'Ol 6.5 X55's. The rule of thumb is everything in a dime size group at 100 yards with my handloads in my M38. Those little Carcano carbines are heaven to carry in the bush all day as they're so short and light but unless you are into hand loading using a Carcano is out. My carcanos sat in the gun locker for many years before I finally bought dies and brass and got back into shooting them. The little artillery carbine is almost as tiny and handy as an M1 carbine but with excellent hitting power. Most guys down here using Milsurps seem to be carrying Lee Enfields of all makes though.
Al