The Firing Line Forums - View Single Post - Ruger Mini-14 Extraction Issues

rc · May 25, 2017, 01:34 AM

Take fired case and trim till you have a straight open case
Pop out primer and drill flash hole to accept a small 4mm bolt with a screwdriver head. Nut goes outside the case. Use the screwdriver through the mouth to hold the bolt so you can get a firm attachment between the 4mm bolt and the case. You've now made a polishing tool for the straight part of your chamber that's relatively safe to use. I've done this with pistols that have had extraction issues and cleared problems up quick without an insane break in period. You will need red rouge, flitz or fine valve grinding compound. Coat the brass and figure out how to spin it in the chamber. The trick with the ruger will be finding a flex drive or something to get it spinning smoothly in the chamber so you get it done quickly without a lot of fiddling. I would go slow and move it back and forth while you turn it until it won't grab or stick in the chamber anymore when you spin it. Once you take the burs out of the chamber with a case fired in that gun it should run with anything! If you can't get a drill or flex shaft to make the turn into the chamber, you may try a 1/4 ratchet against a nut or nuts at the back of the case through the bottom of the receiver. You can probably use a cleaning rod from the muzzle to help you move the brass in and out of the chamber while you spin it with the ratchet. May take a friend and some patience before the polish does its job and you feel smooth movement but it will be worth your time.

May 25, 2017, 01:34 AM	#9
rc Senior Member Join Date: April 28, 2001 Location: CA Posts: 1,926	Simple fix. Take fired case and trim till you have a straight open case Pop out primer and drill flash hole to accept a small 4mm bolt with a screwdriver head. Nut goes outside the case. Use the screwdriver through the mouth to hold the bolt so you can get a firm attachment between the 4mm bolt and the case. You've now made a polishing tool for the straight part of your chamber that's relatively safe to use. I've done this with pistols that have had extraction issues and cleared problems up quick without an insane break in period. You will need red rouge, flitz or fine valve grinding compound. Coat the brass and figure out how to spin it in the chamber. The trick with the ruger will be finding a flex drive or something to get it spinning smoothly in the chamber so you get it done quickly without a lot of fiddling. I would go slow and move it back and forth while you turn it until it won't grab or stick in the chamber anymore when you spin it. Once you take the burs out of the chamber with a case fired in that gun it should run with anything! If you can't get a drill or flex shaft to make the turn into the chamber, you may try a 1/4 ratchet against a nut or nuts at the back of the case through the bottom of the receiver. You can probably use a cleaning rod from the muzzle to help you move the brass in and out of the chamber while you spin it with the ratchet. May take a friend and some patience before the polish does its job and you feel smooth movement but it will be worth your time.