Looking to see what the approximate velocity would be for a standard 8.85” barrel and Federal HST 124 grain +P rounds. The MV is listed at 1200 FPS, but I would expect it to be higher with the MP5’s longer barrel. Any ideas on what it would approximately be? Thanks!
L109
Velocity of MP5 with standard barrel?
1 reading
1345 fps
When I was trying to tweak out a subsonic load for 147 grain rounds for my MP5 clone, I did a lot of chronographing rounds out of a Ruger P89 to see what a regular barrel would do, then tested them in the CA89. I would typically get 150-200 fps higher speed from the longer barrel.
Now keep in mind that this is based on 10 year memory retention so I could be a bit off. But that is the best that I can recall. And the number is based off of the 1200 fps being accurate.
When I was trying to tweak out a subsonic load for 147 grain rounds for my MP5 clone, I did a lot of chronographing rounds out of a Ruger P89 to see what a regular barrel would do, then tested them in the CA89. I would typically get 150-200 fps higher speed from the longer barrel.
Now keep in mind that this is based on 10 year memory retention so I could be a bit off. But that is the best that I can recall. And the number is based off of the 1200 fps being accurate.
Leib...your icon thingy there looks like one of the "guards" on half life 2. Is that right? I loved that game when it came out.
Ok, found my old data. Yeah, I just needed some incentive...
ETA: Found my ammo can of 147 grain subsonic loads. Looks like I went with 4.4 grain of Power Pistol. That cycles the weapon fine with or without a suppressor. Haven't tried it in the HK94 SBR yet though. Still need to get a three lug on that one.
I don't see any 124 grain so that's in the middle somewhere. But Hopefully this data will be somewhat useful.
ETA: Found my ammo can of 147 grain subsonic loads. Looks like I went with 4.4 grain of Power Pistol. That cycles the weapon fine with or without a suppressor. Haven't tried it in the HK94 SBR yet though. Still need to get a three lug on that one.
Very interesting Retro. I've always bought the S&B because it is advertised as the hottest 'budget' 9mm out there...it's reliable and my 89 / 94 clone guns love it in FA. Fiocchi advertises itself as almost 100fps slower than the S&B yet you have it hauling ass at over 1400 fps out of an '89. Wow. Guess I'll scoop up a couple cases and see how it does. Thanks man!
Another data point is that I've had 100% success with PPU 158gr factory ammo as far as feeding and reliability. No issues with HK mags, MKE mags, and POF mags.
They're also definitely subsonic out of a full-size MP5 and by far the quietest factory ammo I've fired that actually cycles reliably in every firearm I have, unlike something ultra-niche like Freedom's HUSH line.
They're also definitely subsonic out of a full-size MP5 and by far the quietest factory ammo I've fired that actually cycles reliably in every firearm I have, unlike something ultra-niche like Freedom's HUSH line.
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