05-11-2020, 07:59 PM
(05-10-2020, 11:48 PM)Don Wrote: Willie,
These are actually 20mm cases. The fired brass my Son bought are currently primed with the 20mm factory burden primers which have the anvil as part of the case. I'm attempting to make a proper dia. X depth pocket to use the .50 BMG Boxer primers which is what most reloaders do. If our information is correct, a dia. of .3125/.3135 with the primer O.D of .317/.318 "should" result in a sufficient press fit to retain the pressure of the ignition without backing the primer out. That's about twice the diametrical difference of a large rifle primer in a case such as a 30-06 or .458 Winchester. As I mentioned before. Reaming would be ideal were not for the large cham. on the leading edge of the reamer not producing a sq. corner at the bottom of the pocket.
Thank you for your interest. Always like to hear different thoughts, as they sometimes are staring you in the face and it doesn't dawn on you.
Don
Oh, OK. The case didn't look to be that big in your pictures. Have you by chance tried using one of of these carbide cutters? Might make quick work of removing that Berdan anvil as well. https://www.midwayusa.com/product/1012926787
Willie