Training with PMAGs vs USGI

I will most likely be taking my first Rifle level I course this year and I am wondering if it would be better to use my USGI mags or my pmags. I have D&H USGI, CPD USGI, and pmags, however, The D&H mags are hard to seat on a closed bolt even when loaded to 28 rounds as opposed to the CPD and pmags that easily seat when fully loaded to 30 rounds. Will using the D&H mags be better for overall training since they could be more difficult to use and thus being more of a challenge when training? For a level I rifle course how often will we even be seating mags on a closed bolt?

I think you’re over thinking it. Use everything that you have. See what you like. You’ll develop a preference and then replace worn out mags (or add) with what you prefer. The stiff mags may loosen up after the spring gets some use anyway.

Use all the mags and don’t sweat it

Yeah I might be. I also cant use all of the mags I have too many.

For me, the priority for mags going to class is that they function. Thus they don’t detract from the training experience, which I paid for in money, ammo, and time. For you it might be a mix of metal and polymer mags. For others, it’s all metal or plastic.

Just bring extras.

Use the mags that work in your rifle. Seems pretty simple to me.

This.

Mags are expendable. If they stop working or don’t function 100%, either scrap 'em or mark them for training use only.

The last thing you want at a class is an item of equipment holding you back from learning. Take what works and focus on being a good student.

Either will work. I find Pmags much easier to load, so that’s what I usually use.

If you’re going to use USGI, just make sure you’re wearing gloves. They’ll cut you.

Pmag or not, load to 28. You have less leverage on rifle reloads since the magwell is in front of your hand instead of below it. Doing tac reloads with mags loaded to 30 is asking for something embarrassing to happen.

And don’t forget: take a pen and paper!

If you are having issues with a variety of magazines seating (assuming you are using the correct technique) you may want to actually take a closer look at your weapon. Maybe you have something out of spec? I would seek some competent advice or seek someone out that has more knowledge about the weapon and allow them to try and seat the mags, etc…

Definitely go into the class with weapons and accessories that work! You don’t want to spend too much time in a formal class struggling with keeping a weapon functioning.

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Its possible something could be out of spec but I doubt it. I have several of each and no matter what method I try only the D&H give me problems. I tried searching for specs such as the magwell length/width and mag catch height but I could not find anything.

If I had a known-good lower, and several brands of magazines, and only one brand of magazines gave me issues, I would not own any of the brand that didn’t work in my gun.
Just because a magazine doesn’t work in your gun doesn’t necessarily mean that it’s a bad mag, just that it is a bad mag for your gun.
There are tolerance stack issues that can make good guns not work with good mags. There are also bad runs of good product.

I would bring both, in case you need back-ups. During the duration of the course use the mags that have proven themselves to be reliable in your weapon.

I just ran an advanced course with a bunch of D&H mags. They must be on the low end of the spec because they rattle like shit in the gun. I hadn’t used them before, though, and wanted to see if it would affect functionality. I had numerous seating issues and had to SPORTS more than once. I never have any issues with my pmags or C Products. What I learned is that the D&H make ok training mags (I don’t mind having a couple of issues during the day because it reinforces my ability to handle the situation in real life) but I won’t bet my life on them. Defensive ammo will be kept in known good mags.