I learned that I needed to break it in. at least shooting a bunch of rounds helped me because it was crimping or jump crimping. since it was a 2"barrel and only 23.9oz weight the heavy .357 ammo was 'crimping'.
This is twice in a couple of days I've heard someone say this. It's not the correct terminology, but it's easy to understand. For anyone who doesn't understand, here's a rundown.
Revolver ammo is typically crimped, more specifically, with a roll crimp. The end case mouth is lightly rolled around in to the bullet, usually in to a crimp groove or cannelure. The end of the brass cartridge case physically grips the bullet.
This crimp does two things -- it holds the bullet in place for a moment so the pressure can build evenly and the bullet can begin it's forward motion at the proper time, and it also holds the bullets of the non-shooting cartridges in place during heavy recoil. (at the handloader bench, it does a third job... it removes the case mouth belling so that the rounds will chamber properly)
Bullets that are heavy resist motion. When you have a light(ish) handgun and heavy slugs, the recoil is stout and the entire handgun jumps backward toward the shooter when you discharge it. The
other loaded rounds in the cylinder lurch backward as the handgun lurches backward under recoil. But the heavy slugs in those loaded rounds don't tend to want to move backwards with the recoil.
An object at rest tends to stay at rest until a force is acted upon it. So those bullets do move backward with the recoiling handgun, but they resist that movement at first.
When you don't have enough crimp on those rounds, those bullets then
jump the crimp. They look as if they have jumped forward a small bit. In actuality, they simply tried to stay in one place while the handgun, it's cylinder, and all the cartridges in it lurched backward. But they will try to move and some will succeed on occasion. And with the next discharge, the same force will act upon the rounds that haven't yet been fired. So, after 3 shots from a 6-shot revolver, you've got three loaded rounds that have taken the recoil pounding three times and are trying to "jump crimp." If one of them does jump -- even by one millimeter, then the next discharge will move that bullet even more.
When the bullet has crawled forward enough to stick out of the cylinder face, it'll hang up the motion of the cylinder and tie up the revolver until you can push it backwards with force, out of the way.
For those that believe a revolver will never fail... just try shooting some ammo that jumps the crimp. It's a failure that you won't rectify during any kind of a fight.
