Quote:
Originally Posted by kurusu
Maybe because the 4mm M20 (the one on the left) as no rim and might get stuck after fire.
Attachment 44070 |
Mario, is the 4mm barrel insert rifled or smoothbore???
Primer-only ignition can't be all that powerful, even for a .157" projectile...
A barrel insert installed from the muzzle leaves the chamber end unsupported...The Luger chamber is ~.386" dia and the bore is ~.346" dia...So the barrel insert is unsupported at the chamber end by ~.040" total...(.020" radially)...So you can't have too much chamber pressure or it would expand the insert, making it 'difficult' to remove...
