I just bought a new S&W 627 4inch bbl.I always wanted this model, only been out 1 time with it and maybe put 60/70 rds through it, it ran fine but yea it got dirty fast. I was shooting warm 38spl and some 357 loads, all my reloads, while warm all the brass dropped right out. I'll keep tabs and report back as shooting season heats up.