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 Should I worry about my M&P40 Pro Series?
Airborne_Infantryman  [Team Member]
2/19/2012 12:09:54 PM
I bought a brand new M&P40 Pro Series with the 5-inch barrel, and fiber optic sights, and finally took it out shooting today.

The first rounds I fired out of it were some 3 year old Federal 135g RHT Frangible rounds. I had multiple failures to return to battery with this ammo.....around 5-6 out of 50 rounds.

I then fired 50 rounds of Federal 180g HST JHP, and had no issues, followed by 50 rounds of Winchester Ranger-T 180g JHP, again, with no issues.

Fluke, or something to worry about?

I wonder if this particular M&P just hated the Frangible rounds?
Mach  [Team Member]
2/19/2012 12:26:50 PM
frangible rounds are known to be very lightly loaded.

My H&K USPc .40 ( only gun I ever shoot frangible with, requal required ) fails to return to battery after about 150 rounds of frangible. It's the light loaded ammo combined with a not-so oiled (or greased ) gun and some carbon build up.

If it functions with standard FMJ or carry ammo, I wouldn't give it a second thought.

Airborne_Infantryman  [Team Member]
2/19/2012 1:09:51 PM
Originally Posted By Mach:
frangible rounds are known to be very lightly loaded.

My H&K USPc .40 ( only gun I ever shoot frangible with, requal required ) fails to return to battery after about 150 rounds of frangible. It's the light loaded ammo combined with a not-so oiled (or greased ) gun and some carbon build up.

If it functions with standard FMJ or carry ammo, I wouldn't give it a second thought.



Well, the other 100 rounds were JHP, and they fed and functioned fine......meh. Fluke I guess....
sigman68  [Member]
2/19/2012 1:20:00 PM
Probably not enough grunt to run a brand new gun but it could also be overall cartridge length.

I reloaded some 155 grain bullets slightly short and would get failures to feed about once or twice per mag in my M&P40 FS. The next batch I loaded .020" longer and they run 100%