|
What kind of gun are you talking about?
Not saying I recommend this, but you can get a rough idea by putting masking tape on the head of an unfired case.
Another method I've used is to glue a brass rod into an unfired case so you can push and pull from the muzzle, notch the brass rod right at the muzzle with a razor blade so you can see how much it moves; also not a precision measuring device.
|