Nightcrawler
Member
You know how some 9mm pistols also come in .40, and the magazines have the same dimensions and such because they fit into the same frame?
For instance, I looked at a Ruger 9mm 10 round mag, and a Ruger .40 10 round mag today. The feed lips and mag body were identical, dimensions-wise. The .40 follower was very slighly different.
I've heard that with some pistols, you can load 9mm rounds into a 10 round .40 pistols. I've heard that on some (like the Ruger .40 10-round magazine marked P17/10, for instance) this works, and on others, the follower is too different on the .40 mag.
Which gives me a thought. If anyone has a 9mm gun and wants to try this, I'd appreciate it (specifically, a Ruger P89, as that's the gun in question). Take the 10 round .40 magazine apart, and swap the follower with that of a 10 round 9mm magazine. Load it up with 9mm rounds and see how it works.
If either of these ideas work, it'll give you a more economic source of fifteen round magazines. If nothing else, it'll give you some reasonably reliable range mags (in STANDARD capacity, not castrated) so you can save your expensive factory prebans for carry.
If THAT doesn't work well, buy a USA brands or otherwise cheap aftermarket mag, and replace the follower with a Ruger factory or Mec-Gar one (from a 10 round post ban mag) and replace the spring with a Wolf +5% or +10% spring, and see how it works.
Just an idea. Anybody tried it? And it's certainly cheaper than dropping eighty bucks down on a preban factory mag, assuming you can even find one. Most magazine related problems (slide not locking back, or locking back too soon, double feeds, etc.) can be traced to a bad follower or a bad spring, I should think.
For instance, I looked at a Ruger 9mm 10 round mag, and a Ruger .40 10 round mag today. The feed lips and mag body were identical, dimensions-wise. The .40 follower was very slighly different.
I've heard that with some pistols, you can load 9mm rounds into a 10 round .40 pistols. I've heard that on some (like the Ruger .40 10-round magazine marked P17/10, for instance) this works, and on others, the follower is too different on the .40 mag.
Which gives me a thought. If anyone has a 9mm gun and wants to try this, I'd appreciate it (specifically, a Ruger P89, as that's the gun in question). Take the 10 round .40 magazine apart, and swap the follower with that of a 10 round 9mm magazine. Load it up with 9mm rounds and see how it works.
If either of these ideas work, it'll give you a more economic source of fifteen round magazines. If nothing else, it'll give you some reasonably reliable range mags (in STANDARD capacity, not castrated) so you can save your expensive factory prebans for carry.
If THAT doesn't work well, buy a USA brands or otherwise cheap aftermarket mag, and replace the follower with a Ruger factory or Mec-Gar one (from a 10 round post ban mag) and replace the spring with a Wolf +5% or +10% spring, and see how it works.
Just an idea. Anybody tried it? And it's certainly cheaper than dropping eighty bucks down on a preban factory mag, assuming you can even find one. Most magazine related problems (slide not locking back, or locking back too soon, double feeds, etc.) can be traced to a bad follower or a bad spring, I should think.
but for CCW and HD, I'm not going to quibble over a $25 savings in order to make 100% sure I don't run into unneccessary legal troubles over a couple of extra rounds! In other words, I only use pre-ban mags in my HD guns when they're not at the range.
But using it absolutely stock is ok. Really dependent on which gun you try this on. It has worked for me w/ a couple guns, but not 100% reliable w/ others. For this reason, I only use the 40 mags for range use & preserve my hi-caps for HD & competition.
OEM mags usually holds 14 rnds and work perfectly.....But how would I know 