The bore is rough. Looks like they left something running in the barrel while they went for lunch. Works okay with copper jacketed bullets. Going to give it a try with PC'd bullets.
Not knocking what you're doing but in some cases it's just cheaper and easier to rebarrel, than keep on fighting it.
I'm extremely lucky with my Chiappa 357 mag, Mod 92 clone. It's got a perfect bore.
After reading some comments on this site, I checked the bores of some acquaintances Chiappa, Rossi, and even a Winchester.
The bore on my rifle was the exception, other than the single Winchester.
I had an Uberti Model 73 clone when they first came into Canada. It had very light chatter marks in the barrel as well. They didn't create any fouling issues, but I was only shooting jacketed bullets through it.
I traded it off because it didn't see much use.
I use my present Chiappa quite a lot, and it has a 20 inch barrel.
It handles stout loads very well.
I have a lot of H110 on hand, and it pushes 125 grain bullets just over 2300fps with 22 grains of powder, over small rifle magnum primers.
I've used both small rifle primers and small pistol primers, both magnum and standard, and settled on the magnum. Velocities are more consistent with H110 with magnum primers.
I use this rifle mainly for plinking, but it also does double duty as a bunny/coyote rifle out to 100 yds. It should be good for Deer from a tree stand at similar ranges, but with heavier bullets.
I like this handy little rifle a lot, it replaced the M1 Carbine I carried for the same purpose.
