45ACP brass with enlarged flash holes

[peels]

I found three Winchester 45acp brass with large flash holes among some range pickup brass. Any idea what's going on here?

 

[Bwana John]

I drill them out to 1/8" for shooting primer driven 45acp wax/polyethylene projectiles.

But I have seen and reloaded factory 45acp brass with 1/8" flash holes and standard bullets, I think the larger factory flash hole came with factory loaded "green" primers.

 

[Erief0g]

Interesting.

I wet tumble with spent primers still intact. Then dehydrator dries. Then progressive deprime and prime.. I would never know come to think of it

 

[Jim Watson]

First generation Winclean lead free primers. The Dinol mix generates higher pressure in the primer itself so they made the flash holes larger to vent it into the case.
They load normally; I did not see any velocity change.

They soon realized they did not need as much of the hot and expensive Dinol, so now we complain about small primer .45s.

ETA. Which makes me wonder about the Federal Catalyst primer. What with shortages of everything, are they making the proprietary primer and selling the ammo?

 

[Walkalong]

I have seen some of those, maybe for the clean primers with more oomph, as they wanted to back out.... IIRC?

Never mind, I see Jim covered it. I really should read posts first.

 

[peels]

Thanks for the info Jim! I've shot some win clean 9mm before...the ammo was truly clean.

Will load as normal. Thanks!