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I am picking this up from the PS90 action thread...

How well has the magazine been tested for having fully loaded? I know for AR-15, people have had no significant wear and tear for having the magazine fully loaded on 30 and 20 round magazines. All my magazines for other guns are always fully loaded at all times and I don't keep blank magazines.

I will be changing the 30-round mag that comes with the gun to 50-round capacity and I will probably pick up a couple more magazines later on. Anyone have had their magazines for a few years and always have it fully loaded at 50?
 

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No sure answer to this. Everyone here has their own theories of spring stress and such. And, in civilian hands, the gun is still new.

I keep 1 mag loaded, and I only have 40 rounds in it. But, even in my handgun mags, I underload the mags by 1 round except for my P99c - my carry gun.

Also, after I tested every mag to make sure it works (I have 9 total) - I only use the one loaded at the range now. Someone else here suggested that - since the mags are made of polymer.
 

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I have one that's been fully loaded since I bought it well over a year ago. I empty it at the range to test for spring set related malfunctions and it's still going strong.
Tomac
 

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I think I have read some old posts that claimed the spring did not have as much "oomph" after being left loaded at 50 rounds for a while.
 

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mags

Any mags in use by a PD will be loaded 24/7 if they are issued. The only mags at a PD that aren't loaded are the ones in inventory as spares that are not currently issued. Our local PD has had their P90TRs for five years and have yet t relace a magazine. They are all kept loaded to 50rds 24/7.
 

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I actualy just had a magazine structural failure. I have used it a few times but I have left it loading in my ammo box. I pulled it our yesterday to find some major cracking all along the side and feed area.

I am not sure what caused it, thermal issues should not be a factor as it has been inside. I will post some pics later tomorrow. I may send it in to the factory.
 

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Loaded mags

I always keep my mag underloaded. From field experiance / training from officers both Police & Milatary. I think the practice of numbering your mags andchanging them out ounce a month is good policy.
 

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I went to the range yesterday and shot a fully loaded mag that I had loaded more than a year ago. The PS90 SBR is my home defense gun so the magazine had stayed loaded the whole time.

No problems at all, all 50 shots fed and fired reliably. :?
 

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A lot of us use our guns as a means of self defense, and that factor right there is what you should ultimately decided to go off of. Anything that your life may ultimately depend on should be treated as such. I like to equate the discussion to air frames and parts; most aircraft parts will far exceed their expected life span by 2 or 3 times that of what a manufacturer specifies. The point is not to use something until it falls apart or breaks when it’s needed most, but to have it ready at all times.

Has a magazine from WW II been found still loaded and functioned fine? Someone on the internet said it has. Would you bet your life that it will function? I sure as hell wouldn’t be found dead with one. I’ll stick to components that I KNOW work.

For those of you out there like me, we've added an extended life spring here http://www.magazineparts.com/productDisplay.php?id=SPNG
 

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I've had my 8 mags loaded for about two years, and a collective 6000+ rounds through them. Though I've never had an issue, the springs are defiantly not as strong as they were new.
 

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Promoted Pawn said:
I've had my 8 mags loaded for about two years, and a collective 6000+ rounds through them. Though I've never had an issue, the springs are defiantly not as strong as they were new.
U may have the most rounds thru a PS90 so far...
 

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ShipWreck said:
U may have the most rounds thru a PS90 so far...
and it shows. The bore of my first PS90 is messed up with some slight bulges. But, to my amazement, accuracy and reliability have not been effected.

I can also report absolutely no wear in the (all plastic- gasp!) hammer group, and no apparent wear between the 'floating' barrel and the receiver.- That is something Therm was concerned about.

Like I've often said, I've never had a single problem with the PS90 and I've even made it a point to shoot it on hot days, very cold days, and it once went on a survival overnight in the freezing rain.
 
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