Ultrasonic Brass Cleaning and Primer Pockets

Equipment and Accessories Ammunition & Reloading
1

I tumbled three different types of brass in walnut media (PPU 308 Match, PPU 7.62 NATO and MEN 7.62 NATO) till it was nice 'n shiny, then decapped/resized. Then threw 20 of each in the ultrasonic bath (20% Simple Green Max) for 30 minutes and found that the MEN and PPU NATO primer pockets did not clean out too well. The PPU 308 pockets came out almost squeaky clean.

I’ve used the 20% Simple Green to clean small engine parts and a couple other things and they always came out spotless, not a speck of crud left after a 30 minute hot bath. So why is the crud left by NATO spec ammo so tenacious?

1 Like
2

The higher the pressure the higher the heat. Probably getting baked on there…harder to get off. Stainless Steel pins for the win. :+1:

3

I was thinking it might be sealant. I’ve put some really grimy stuff in the US cleaner and everything came out squeaky clean in 30 to 45 minutes.

I hear stainless is the cats meow when it comes to cleaning primer pockets.

4

Feel free to use mine anytime you want.