But I'll add this, in agreement with the gp-100 fans already posted, buy a GP-100 that has a tight barrel/cylinder gap, and Very Little endplay as well. I recently saw a gp-100 that probably had .0035 endplay in the cylinder, with a .0065 b/c gap as well. The gap is within Ruger spec's; but Ruger wouldn't answer me over the phone re: what is acceptable endplay! That surprised me!
I own a 6" GP-100 stainless with approx .001 endplay and approx' .004 b/c gap.....nice and tight; which makes the frame on the revolver last longer if the handloads are reasonable. Just a thought, but I'd take some good feeler-gauges with me when buying your next revolver.
Take care.