My Ruger Mk III pistol was prone to stovepipe jams. It would get one and sometimes two of them in each magazine full of ammo.
I kept asking around different forums until somebody told me that the magazine could be modified to fix this problem.
There are two pairs of lips on the magazine, separated by a gap through which the rim of the case rises while feeding. The rear pair of lips have a squared-off edge that the case sometimes contacts after firing, before it has a chance to move backward far enough to hit the ejector.
When this happens, you get a stovepipe jam.
By rounding off and polishing the front edge of the rear set of magazine lips, this problem is eliminated.
I rounded and polished the front edge of the rear set of magazine lips with a Moto-Tool and some #400 grit wetordry sandpaper, and polished the upper edge of the front set of lips. - After that, no more stovepipe jams!
In the picture which follows, two magazines are shown. Both have the follower held down and out of the way with a toothpick. The rearmost clip is stock, the one in front is modified.
{ Click the image to see it magnified. }
I kept asking around different forums until somebody told me that the magazine could be modified to fix this problem.
There are two pairs of lips on the magazine, separated by a gap through which the rim of the case rises while feeding. The rear pair of lips have a squared-off edge that the case sometimes contacts after firing, before it has a chance to move backward far enough to hit the ejector.
When this happens, you get a stovepipe jam.
By rounding off and polishing the front edge of the rear set of magazine lips, this problem is eliminated.
I rounded and polished the front edge of the rear set of magazine lips with a Moto-Tool and some #400 grit wetordry sandpaper, and polished the upper edge of the front set of lips. - After that, no more stovepipe jams!
In the picture which follows, two magazines are shown. Both have the follower held down and out of the way with a toothpick. The rearmost clip is stock, the one in front is modified.
{ Click the image to see it magnified. }
