Re: Which would you carry: S&W M&P 40 or XDM 40?
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: queequeg</div><div class="ubbcode-body">
The striker on mine locked up in its channel due to corrsion. This is a stainless slide but the striker is actually blued and got a little rusty. Enough so that it locked up pretty solidly. It took about 15 minutes to resolve the problem, and I used some 800 grit wet sandpaper and some CLP to smoothe it out again. I now never leave a loaded round in the chamber after walking, or extended "intimate" carry any more, without a quick wipe and a function check. Also a little extra oil in that part of the slide seems prudent as well.
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The striker channel of a striker fired pistol should NEVER be oiled. You're just asking for it to get gummed up and stop when you need it. Clean it out and leave it clean...not oily.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Rookie</div><div class="ubbcode-body">
I've handloaded thousands of rounds of 9mm and 40 S&W for Glocks, Sigs, H&K, XDs, and M&Ps. Rounds that feed beautifully and reliably through all the others, will cause problems with an M&P. I haven't checked specs on the the M&P but I'm guessing tolerances are different and recoil springs are heavier. I gave up trying to load lead bullets in an M&P. Couldn't ever make them headspace correctly and they would either not feed, or would go too deep and would have to be pounded out. Jacketed bullets are the only thing that would feed reliably. Handloads also have to be hotter to cycle the M&Ps I've loaded for.
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I have loaded thousands of 147 grain lead truncated cone bullets in my 9mm M&P. In fact, I don't believe it's ever had even a single jacketed bullet run down its bore.
I know .40 is tougher to load for, though. The only problems I've had is that the freebore is a bit short, so I had to load them about .010" shorter than where some guys were, to make sure they don't get jammed into the rifling.
I have loaded down to ~130 power factor and never had a problem. Clays powder wouldn't cycle my gun at 875 FPS, but the rest do.
Supposedly, Glock recoil springs for a G17 will work in an M&P if you need a lighter spring. I have never seen any use for it, though. My *barely* minor PF loads cycle my M&P just fine.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Babo</div><div class="ubbcode-body">
The only technical question I still have is does the M&P have an internal safety blocking the firing pin channel as the XDm does.
I can't find that info anywhere. </div></div>
Of course it does. Every modern gun has a drop safety, and they all pretty much use the same style, like the one to which you refer.