RE: BEST SINGLE SHOT
RUGER NO 1's one of the most accurate guns for the money you'll ever buy. Only one thing is they tend to have a slower twist rate in most calibers so you should be choosing medium to lighter bullets for optimum accuracy.
Personally I didn't like the TC's feel the rifle shot well enough just didn't feel right in the hands.
The Winchester 1885 is another great accuracy rifle. I have one in a 270 win it's just to pretty to be carrying around horse back.
All around meat gun ruger no.1. I use them in hunting and all my competition shooting. Superb off hand shooting gun for balance one of the best.