First you won't go wrong with a Cimarron .... good choice
from their website:
Caliber:
45 LC, 44/40, .357 Mag.
Magazine Capacity:
10 Rounds
Barrel Length:
16" Round
I had the SRC in 38 in the early eighties, great little shooter , no issues.
as far as accuracy on the farther targets.... what's farther ? 100 yards ? 200 ? it's a light bullet after all, subject to cross wind etc.
and will be effected muzzle velocity.