I would like to gather info on average length of sealing surface to sealing surface of bare primer breech plugs.
Step one: New primer length? Step two: Overall length of breech with new primer installed Step three: Install plug in gun bolt up primer in gun close bolt then remove primer and breech now measure breech with crushed primer. Overall length?
Will have 3 deminsions. Also post bolt setup type and gun model Thanks
Post by cmcfirearms on Feb 8, 2016 12:25:57 GMT -5
numero uno- did you mean for this to be in the modern inline section?
Dos- knight mountaineer 45 cal bare primer system.
Fed 209a primer .296" new Loaded plug length 1.880 After cycled through gun 1.880
Added a .005 shim to plug pocket
Fed 209a primer .296" Loaded plug length (with .005" shim) 1.885" After cycled through gun 1.883
I assume the original setup had around .003" between the plug seat and my primer when loaded. Minus whatever spring back a 209 may have. If I had win primers on hand I believe I would have had an interference fit without the shim.
Last Edit: Feb 8, 2016 12:26:32 GMT -5 by cmcfirearms