I have an original 457 mag that I've never had problems with, and two ProMag mags that I recently purchased. One of the ProMags seems to be fine, but the other has a problem with the follower getting "stuck" at the bottom of the mag when it's filled (7 rounds).
It doesn't happen all the time, but sometimes with a full mag, the first round will strip off & chamber correctly, but the follower gets stuck at the bottom, which means the rest of the rounds never get pushed up into postion.

I've taken the mag apart and cleaned it (didn't seem any more dirty than the others), and LIGHTLY sanded the sides of the follower, first with 200, then with 600 sandpaper. I then lightly burnished the sides with oil and reassembled it.

I haven't had a chance to try it again since then. Has anyone else seen this problem with ProMags before? I got them since they were supposed to have a decent reputation.

Anything else I should be checking/adjusting?

Send it back and they will replace it. I use ProMags in my Sig 229 and have never had a problem. They get lots of negative reviews, but I can't complain.

While peoples experience may vary, I personally would'nt trust a promag outside of range use. Stick with factory or Mecgar if you can and your semi-autos will thank you with increased rliability.

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J.D. Roy

Good to know, but....hmmm...does Mec Gar even make a mag for the 457? I don't see any listed on any of the common online vendors...

With the 457 you are probably stuck with paying the higher prices for S&W magazines to get reliable service. Use the pro mags for range use only. If it makes you feel any better most of the semi-autos in my collection only have magazines available from S&W only. Sometimes a good deal or two comes along for the genuine product.

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J.D. Roy

I've never hear anything positive about Promags, and have always avoided them. Find you some factory mags, and if you have to go aftermarket find some Mec-Gars. The best semi-auto pistol in the world isn't worth anything if the mags don't work.

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"I'm your huckleberry."

I've never had a promag that worked properly-been through 5 of them.

Do not go cheap with mags!!!! They are vital!! Bite the bullet.. spend the $$$ for Smith and Wesson Mags.. or Mecgar!

I have Smith Mags for my 457 and use Mecgar and Beretta mags for my Berettas!


Best

Bob

Lesson learned! Just ordered some S&W mags for the gun...

I tried them twice, worked ok...but the slide would not remain open after the last round was fired. I would much rather stick with original mags or get them from Mecgar if available.

Like some of the previous forum member posts, I have never heard anything good about Promags. One forum member in the past best summed up the situation when discussing Promags by stating that if you step on a Promag really hard and squish them almost flat, they make reasonably good door stops.

I would not even use them for practice at the range in a quality pistol, jamming a nice S&W semi-auto and/or needlessly having stoppages to clear just is not something I enjoy at the range, just my $ .02

Watching all the possible sources for mags, the bid bay auction site, the firearm auction sites, and some of the suppliers like Midway occasionally offer some excellent deals on mags.

I had two Pro Mags for my 457. Neither would allow the gun to fire in DA mode. They were fine in SA mode, but for what I figure are poor tolerances, they would not allow the first shot DA mode to function.

I gave them away with the warning that they should never be used off the range.

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Can open, worms everywhere.

A major problem with ****** mags is that, even if they are priced at half what a factory or Meg-Car, maybe half of them will work, and you end up spending just as much to have a shady mag that may work as a correct mag that does work when you scrap the complete junker. Pretty false economy.

I wouldn't even trust them as a reliable door stop