Until our transition to the P320 two years ago, we issued .40 and allowed POWs in .38, 9mm and .40 with and issued .40 P229 and a POW G26 being the most common combo. We issued brass cased .40 and nickel cased 9mm to try and prevent ammo mix ups. Despite this we saw multiple instances of 9mm loaded into .40 mags and at least one instance of .40 loaded into. G26 mag.
The purple ammo is officially called Readily Identifiable Training ammo or RITA.
That's funny... American Eagle was the best for us as well. The performance of the low-lead isn't great, but I won't complain about the lower blood lead level.
I was out shooting my Sig Legion X-Carry today when something hit me in the nose. When I finished the string with holes all over the target I looked the gun over. I immediately felt the 508T flopping around. The left screw was loose and the right screw was sheared off it would turn out about flush with the slide. When I got it home and looked closer, it appeared as if the loose screw had no threadlocker intact, though I did install it. The broken screw though of course is still holding fast. It is going to take some work to remove. My guess is that the left screw came loose and then the right screw broke, but who knows.
We had issues with the McMaster alloy steel screws that had the wider (I think .307") head diameter because they contacted the side of the optic. We switched to the smaller head diameter screws (McMaster stainless or zinc-plated depending on application - I think they are .260") and haven't had issues since.
I went back and looked at pictures of the sheared screw from our SRO testing where we fired a pretty obscene number of rounds in a very short time frame and it was the right screw that sheared on that one, but a picture I have of a Glock MOS showed a left plate-slide screw sheared.
From what I've seen, one screw comes loose first. It's "more" loose as the second screw comes loose enough to allow the optic to start shifting during firing. as the optic shifts it impacts the looser screw eventually shearing it. I'm no engineer however, so I can't say for certain what happens or how.
Last week I taught a 2-night L/E Low Light Instructor class in San Bernadino. The handgun round count was only 225 rounds, sharing here none the less.
18 students with the following pistols:
Glock 22 / X300U;
Sig P320/Romeo 1 Pro/ Streamlight TLR1;
Glock 22/RMR/X300U;
Glock 17/SRO/TLR7;
Glock 19/RMR/X300U;
Glock 19/Holosun/TLR7;
Glock 17C/Holosun/TLR7;
Staccato/Holosun/Modlite;
Glock 17/SRO/X300U;
Staccato/Holosun 507CS/Modlite;
Glock 22/X300U;
Glock 45/RMR/X300U;
Glock 17/RMR/TLR1;
Glock 17/RMR/TLR1;
Glock 17/Holosun/TLR1;
Glock 45/Holosun/X300U;
Staccato/Holosun/X300;
Zev OZ9/RMR/X300U;
and I used my M&P 2.0/Acro P2/X300U
No optics issues noted.