I have for the most part been running S&B 115gr fmj through my Coharie / SW full size MP5 and K guns for the last decade...no idea how much, but in the neighborhood of 40k - 50k rounds through these two guns. The S&B is marketed as having 1280 fps, but no idea of the barrel length they used for that test. It functions these two guns wonderfully I think because it is hotter than most other standard 9mm.
I recently picked up a couple cases of Federal Independence 9mm Luger +P Ammo because at the price point I couldn't help myself. Here are the specs:
Manufacturer CCI AMMUNITION
Caliber 9MM LUGER AMMO
Bullet Type Full Metal Jacket
Muzzle Velocity 1300 fps
Muzzle Energy 356 ft lbs
And no idea again of the test gun.
I'm not a reloader and am only vaguely aware of chamber pressures and pressure curves and would like input on whether I can / should run this ammo through my clones in full auto, likely with a suppressor. These clones have the original barrels from 10+ years ago - no idea who made the barrels, or the trunions.
HK addict in constant search for a cure.
The 9mm is a pistol round, so these muzzle speeds are typically rated for a 4.5" barrel. It would mostly be directly applicable to an MP5K. You typically see an additional 100-150 fps when you go to the full length barrel in a MP5 (8.9"). I have a lot of data posted in a few different threads about this. My 115 gr reloads were designed to duplicate either the S&B or Fiocchi round. The Fiocchi 115 gr. round used to be a bit hotter, when they were loaded in Italy (or where ever it was). They dropped the speed on them by around 7% when they started manufacturing (loading) them in Arkansas (or where ever it is).
"Sometimes change sucks."- Anne Frank
Reloading: A low impact exercise with a high impact payoff.
Take your wife or GF to the range more. If you want her to get the bug, you've got to expose her to the disease.
I have a Z5RS coming from the next shipment to Zenith. Following James(Marine0303) recommendations, I just received a case of Winchester 124gr FMJ NATO ammo to break my gun in with. I am not sure if I will stay with this ammo after breakin, or go to my own handloads which I can load to most any spec. The gun will tell me what it likes, and I can go from there. I have a fair amount of PMC 115gr FMJ that works very well in a few "temperamental PO8 Lugers", so I will likely give it a trial also.
I shot 1 magazine of Federal 98BPLE which is +P+. I certainly noticed the recoil and wouldn't suggest running a steady diet of that, but the gun held up.