I was wondering why too. I tried mine out with the shim i made. No good. So i put one on the front of the mag too. It fits real snug now. Planing on getting out today to test it.
That is the fix. I had this problem a couple of years ago and after trying everything it occurred that the BX25 was getting more and more wobbly. After looking it over good I figured the ruger stock magazine spring just was not holding the magazine steady. I looked around and found the magazine holder and spring from Timney for about $10. My BX25's have not had a problem since. I thought that ruger -who were not crazy about large mags- did not put a lot of thought into that part. At the time they designed that part there were no 25 round mags.I've read before that a KIDD magazine plunger with upgraded spring was a fix for these issues. I installed the plunger and spring months ago before ever trying the larger magazines and my last range outing, I shot a few of the bx15s without issue.
What is the Gorilla tape trick? Not had a problem with my BX-25...yet, but...just in case!I called Ruger about it. They said mail it back and they will send a new one. Im going to try the Gorilla tape trick. To help it fit tighter. The Chootem ammo he got before the new panic set in. Academy or Cabala's i think he ordered it from. I like the tri-mag coupler too.
I have never had jams out of my BX25s and I load them by hand. As long as you make sure the rounds are seated to the rear of the mag, you wont have issues.If your loading your BX-25 by hand you are going to get jams. Use a MagLula specifically designed by the Israelis for all Ruger BX magazines.
The MagLula locks on the mag and has release tab on it to remove when finished loading. I don't know of any mag loader that does that. When loading it depresses each round in the mag exactly the same way. Impossible to do that by hand.
If you buy the loader and UN loader kit it's a plus.
To test your mags, load a BX-25 by hand then use the MagLula unloader to unload it. You will see that sometimes a round will flip and there is your jam.
Now use the MagLula loader and then use the un loader and you will see a big difference.
The 110 round, GSG mag works great but you must follow the directions. One big No No are WAXED bullets. You must also follow the maintenance program with it. They also recommend that before you insert the mag the bolt should be locked back.
By NOT locking back the bolt before inserting any mag in a 10/22 you are putting unnecessary wear on both.