Based on my experience with my MK IV,22/45 Target, I disagree:As for the mags, I can't emphasize enough that it's a BAD IDEA to round off the feed lips!!! This is a horrible "fix" for stovepipes. IF the lips are knocking the round off the bolt (big if), it's because the lips are not adjusted properly. Mags with rounded lips loose the ability to control the round as is goes up the feed ramp and hollowpoints and short OAL rounds will tip up and hit the top of the chamber mouth. The only fix when that happens is to buy new mags.
I did the rounding to all 10 MKIII mags I had. I just finished trading away the last of them at 3-for-1. I now have 3 good mags and 1 rounded. The rounded one sits in a box and never gets used. You've been warned!
I started with one mag. And the stovepipes ended. That's why I did the other nine. That's not the issue. The issue is those mags barf with some ammo as described, and the rounding mod is not reversible.If someone is having this issue, sacrificing one mag is a small price to pay, to see if it works.
How would the magazine ejector hold the magazine up high when its spring pressure is pushing the magazine downward?A member named Bullseye,who has not posted for awhile, had a fix for this.
The guy really knows his way around the Ruger pistols and he says the feed lips should set about 1/16th or so below the ejector to stop the case from hitting the lip before hitting the ejector.
I have found this to be true.
On the MK1V the problem could be caused by the magazine ejector holding the mag up a tad high.
I would try a few mags with the mag. ejector removed before grinding on the magazines.
The mag release forms a pivot point on the front of the mag. The mag ejector pushes down on the front of the 22/45 base, which tends to move the bottom towards the rear and the rear feed lips up.How would the magazine ejector hold the magazine up high when its spring pressure is pushing the magazine downward?
I assume you mean you rounded the "front" corners of the rear feed lips as opposed to all corners, correct? I ask because I can't quite make out the rear corners for comparison.I had the exact same problem with my MK IV, 22/45, even after installing a Volquartsen extractor. I read of others having this issue and it turned out that it was the empty case was hitting on the rear feed lips of the magazine, just before it would hit the ejector and this caused the problem. I slightly rounded off the corners of the rear feed lips on one of my magazines. This totally eliminated the issue and I then did the other 7 magazines. None have acted up since this. I took this photo from another person's post, but the fix is the same.
Yes, just the front corners. Don't take too much off or the bullet will flip up prematurely.I assume you mean you rounded the "front" corners of the rear feed lips as opposed to all corners, correct? I ask because I can't quite make out the rear corners for comparison.