Correct. The USPc and P2000 series use the same magazines. These pistols will also accept the P30/VP9 magazines. So if you've gotten a VP9 with a pile of mags on rebate, its likely that all your 9/.40 HK guns can be fed.
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I’m seeing some people say you need to shoot 124 NATO in the P30 to break them in. Is that true?
Correct, one box of full power ammunition. USP and P30 in 9mm.
Back when the UPS 9 came out, Hirtenberger 110gr Flat Point was flooding the market when I lived in Florida. HOT Stuff not meant for handguns, but HK/Glock/Kahr said it was fine with more frequent recoil spring changes. I broke in my USP 9 tack driver on that stuff, ridiculous I know but it was so cheap. Oh to be young and risk life and limb for the fun of it.
Will 147 loaded warm work?
No, it's not. The recoil spring does come a bit stiff from the factory, but the whole insistence that it has to be 9mm 124 gr NATO is bullshit (NATO specs don't even call that it has to be 124 gr). Any decent load that's not 115 gr plinking bunny fart or some competition load that barely makes minor will be fine.
That’s interesting but good to know. Now I seem to remember people saying the same about needing to break in the VP9. I never had any issues with mine.
I think that gun survived a 90,000 round torture test, or something like that craziness. My HK's have never failed me, even ammo related, no issues ever. I have said it a hundred times, but HK makes the best magazines and is part off their awesomeness.
PB