knight bolt gun owners

[bestill]

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

[Deleted]

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.

[bestill]

Thanks yes should be in inline section

[schunter]

Knight Ultra Lite 50 cal bare primer

New W209 primer .299
Loaded plug length 1.883

After cycled 1.881

[bestill]

Appreciate input

[bestill]

16 guns reported
9 disc with.042 variance
7 ultra light- mountaineer.007 variance
Please keep info coming