The 209 breech plug in my old Staghorn has withstood at least 2,000 charges up to and including100 grains.The flash hole is a little bigger otherwise it still looks like new. Nogas cutting of the threads-nothing.

I have always used 209 Winchester shotgun primers until this year when I got 209 Winchester M/L primers. At the advice of some good folks on this forum, i will switch over to Remington.