jnapolski@me.com
jnapolski@me.com
1 post
Joined January 2020

GECO R 9mm Brass

I’m using a 550B. When I encounter GECO brass the floating decapping assembly rises but doesn’t snap. Everything sizes and seems to work fine otherwise. There is mixed reviews of this brass on the web. Any ideas on why the floating decapping assembly doesn’t snap and I’m I hurting anything?
Thanks,
John
dillon
Administrator
dillon
3,222 posts
Joined July 2007

RE: GECO R 9mm Brass

My best guess is that the primer flash hole is smaller than the normal .075" found in American brass. Some European cases have .050-
055" flash holes. This means the depriming assembly is swaging the flash hole larger, and isn't loose enough for the decap assembly to snap back into place.