cant say ive tried anything heavier than rem oil. I have noticed that some mags you gotta smack the crap out of the bottom of them to get them to seat all the way in the loader, if it isnt seated all the way the rounds tilt as it tries to pass from the feeder into the magazine. I will say that it likes the ETS and gen1-3 mags better than the glock mags with the newer floor plate for whatever reason
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MagLula for the win. We have 4 of them. 1 in my range bag, 1 in her range bag and 1 each in our bug out bags. Even though with her Fibromyalgia and not being able to load magazines, the loaders are there J.I.C. They work on every mag we own EXCEPT the drums. Drums are a whole different barrel of monkeys.
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This is why I always ask a friend if they want to go to the BLM with me, free magazine loading. 
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Works for both Single and Double stack mags, too.
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I use Uplula too. Can’t be beat for 9mm. I always load the first round manually before using Uplula.
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ETS does not work with all mags, so it depends on what you’re using it on. For the correct ones, mine works flawlessly and is a huge time and pain saver.
Uplula makes superb stuff, as noted here. I have a few of theirs for strange ones like 22M and Ruger rifle, and they work great.
Good luck!
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I have a speedloader, and it works great on all of my magazines BUT the ones from Springfield. Even after 9 months of break in, I still have to use the uplula as the other one won’t do it
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I’ve used this exact one and it worked great for me, new or old mags , ten rounds lickety split. Does take a bit of pressure though.
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Be sure it’s the SAME ammo. I once bought 32 H&R magnum ammo from retail store. When I got to the range, the guy put 32ACP ammo in bag.
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SME LOCAL 1 here. 20+ years of welding, out with COPD. Also 3 fused discs in neck, shoulder and wrist pains. They say growing old isn’t for the weak. 
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My uplula is too tight on my Staccato mags. It doesn’t slide easily but the spring is so light its not difficult to load by hand.
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Yeah… Staccato magazines are a little bit wider than all other 9mm .
No problems with speed loaders, these are not needed at all, but whenever I was looking for magazine carriers or pocket clips I had to order .40 version. If the carriers are kydex - these can be easily adjusted with heat gun.
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Hi. Back in late 1991 I went to go work in a sign shop. They’d hire a new neon glass blower, who’d recently finished his neon retraining.
He told me one day he’d been a welder. He apparently blew out his neck joints using the older welding helmets. They’d just begun using the flash lenses back then, but for him it was too late.
I left the shop in late 92. I never kept up with the guys then because we moved out of state.
Nope… growing older is definitely NOT for wimps! 
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