I have a bunch of mags that I want to load up with Q3131A or XM193 and store away.

The mags are brand new, USGI.  Do they need to be tested first, or since they are brand new can they be trusted?

Yes, I like to test fire minimum of 1 full mag loads in each of my ARs before putting them away.
You also want to check to make sure they fit and drop free in all your ARs.

yeah you never know when youll get a bad one (even with factory mags)
I have 1 glock 21 mag looks great but almost always hangs up at least 1 round out of the mag
the gun runs 100% with he other 5 mags i have for it

Would you buy a car you haven't driven?  Always try before you buy!

Test first.

Test them.

I bought a couple new D&H Teflon coated 30rders and one of them wouldn't function well in one of my rifles, but it worked fine in my other 3.

CYA-type thing.

WIZZO

Test all mags at least once or twice, possibly more if you're really concerned about making good and sure they work.  

If you feel the need to load up and store away full mags, one would assume that
you feel the need for them to be "ready to go" immediately when needed.  You
cannot assume "ready to go" with any mechanically produced disposable piece of
equipment, unless you have tried it out at least once.  Just my opinion/experience.

I have dozens of NIW mags.  None loaded with ammo.  The only loaded ones have
been to the range with me many uneventful times.

DanM

Always test them; your life cold depend on it.
M

man, ain't that a "gimmee"???

I think I have had one USGI mag that just didn't work.

I would not count on a mag that had not been used.

Quoted: yeah you never know when youll get a bad one (even with factory mags) I have 1 glock 21 mag looks great but almost always hangs up at least 1 round out of the mag the gun runs 100% with he other 5 mags i have for it

Lucky you. I bought 4 preban Glock 19 mags early last year. Work perfectly with ball ammo. They all fuck up with any type of JHP. $75 each I paid. I'd like to track down the guy who sold them to me and have a little chat with him about selling junk...

But to answer the original question, yes, run at least a full load or two through a mag before you bet your life on it.

New Glock 19's do have a problem with followers. Check your follower and use at least a -1 or -3.

M4-Ak

Quoted: New Glock 19's do have a problem with followers. Check your follower and use at least a -1 or -3. M4-Ak

I tried everything. Sent the gun back to Glock, they put in new springs, new followers, polished the feedramp, put in a new slide stop. Still no-go. I got some the new post-ban production "-5" mags, and it works perfectly now.

i hear what you guys are saying.

And of course it is a given that one would want to test all mags (and all other equipment that might be needed).

The thing is, if you have say, 100 mags, then that is 3000 rounds just to run one full mag through a rifle one time each.  And, as some have mentioned, just because a mag might work in one rifle doesn't mean it will work in all your rifles.  And, although something is better than nothing, running a mag until empty one time doesn't necessarily mean that mag is good to go.

This is an interesting thing...  Some guys have hundreds of new mags stored away.  Untested.  

Something big and bad happens and you arm some friends or family members.

People won't be able to test those mags.  Sound of gunfire will draw unwanted attention.  Plus, it might be a long time before you can buy ammo again and you won't want to shoot it unless you need it.

I have 12-15  mags I use regularly and know they work fine.

I am just thinking it is better to have the new ones loaded than unloaded, tested or not.

Test.

Let's give this thread a proper name.

HEY GUYS! GIVE ME ANOTHER EXCUSE TO GO DO SOME RECREATIONAL SHOOTING!

Just load them up.  I have new loaded mags that haven't been "tested".

Load em up

I'd prefer to test them at least once first.