The Firing Line Forums - View Single Post - Lyman Mustang .50 cal and Blackhorn 209 black powder subititute

arcticap · November 16, 2012, 12:21 PM

Maybe your Lyman doesn't need them, but there's O-rings that fit inside of the primer pockets of CVA and TC breech plugs which serves to shim the primer and to seal the primer pocket from blow back by creating a very slight crush fit on the primer when the receiver is closed. One just needs to be careful that the primer is not too tight and will not go off when the action is closed.
The O-rings are 4.5 X 1 mm wide #9262K611:

http://www.mcmaster.com/#catalog/118/3490/=k77on0

It's mentioned in these threads:

http://www.huntingnet.com/forum/blac...lled-apex.html

http://www.huntingnet.com/forum/blac...ader-help.html

http://www.huntingnet.com/forum/blac...d-space-2.html

November 16, 2012, 12:21 PM	#10
arcticap Senior Member Join Date: March 15, 2005 Location: Central Connecticut Posts: 3,166	Maybe your Lyman doesn't need them, but there's O-rings that fit inside of the primer pockets of CVA and TC breech plugs which serves to shim the primer and to seal the primer pocket from blow back by creating a very slight crush fit on the primer when the receiver is closed. One just needs to be careful that the primer is not too tight and will not go off when the action is closed. The O-rings are 4.5 X 1 mm wide #9262K611: http://www.mcmaster.com/#catalog/118/3490/=k77on0 It's mentioned in these threads: http://www.huntingnet.com/forum/blac...lled-apex.html http://www.huntingnet.com/forum/blac...ader-help.html http://www.huntingnet.com/forum/blac...d-space-2.html Last edited by arcticap; November 17, 2012 at 04:26 AM.