Thread: Corrosion on .303 Ammo

I would be VERY wary about firing loaded ammo that has been put through a tumbler.
This is a known risk for over-pressure. I'm guessing tumbling could knock the surface inhibitors off

You probably already know this but make sure you clean the barrel after shooting that milspec ammo. The primers are what makes it super corrosive.

DONT SHOOT THESE ROUNDS FOR GODS SAKE!!!!!!!

"Yea this is the worst one shown. Haha there in the tumbler as we speak!"

Ive deleted what i initially wrote as I hate to be rude BUT no!......... .303 ammunition was loaded with strands of cordite, long thin strands of propellant. Now imagine the following, the ammo that you had was designed to have a specific burn rate, with a specific powder! now that you have put it through a tumbler, you have broken the strands down to a small powder, vastly and Extremely changing the burn rate! also remember this is old ammo, imagine using pistol powder in a rifle cartridge, that's what you have done...... if your not familiar with reloading, think a really bad day at the office and double it!!

PULL the projectiles, the original round I would have fired happily but now after a tumbler NOT A CHANCE!!!

Also the Mil ammo used macuric primers which did have the bad habit of stuffing barrel, the best trick and you may not believe me was boiling water down the barrel, it cleaned up the barrel fast removing the residue and it was hot enough to dry! then use your normal cleaners.