HKPRO Forums banner
Cancel

What Causes This - Possible MP5 problem

3021 Views 4 Replies 5 Participants Last post by  bordercop, 
HighGear
2
This is Winchester 124gr. +P+. Is it caused by too high a pressure forcing the brass into the flutes? We shot about 100 rounds of 124 gr standard pressure and no problems. We then fired 30 rounds of 115, light target loads and were having problems ejecting (not suprised) I ended with 30 rounds of this +P+, and the first 15 rounds went fine with no issues, then we started having failures to eject. Then failures to extract. Upon looking at the brass we found these which were the out of the last 10 rounds fired. Was the chamber getting too hot causing a rise in pressure?



See less See more
Reply
Save
Like
1 - 1 of 5 Posts
bordercop
I don't think even the F models are rated for +P+, only +P.

For what it's worth, +P+ is not a "standard" for pressure, it's simply a designation that means it's hotter than +P. It could be any amount of pressure level above the accepted +P.

Even the best engine in the world can only take a nitrous charge for so long. Have you fired the gun again with standard ammo since then?
Reply
Save
Like
1 - 1 of 5 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
HKPRO Forums
A forum dedicated to and laser-focused on Heckler & Koch firearms, Heckler & Koch accessories and the owners and enthusiasts that love them! Come join the discussion regarding HK pistols, long arms, NFA arms, HK accessories, HK history and trivia and more.
Full Forum Listing
Explore Our Forums
HK HANDGUN TALK HK CLONE TALK HK LONG GUN TALK HK NFA TALK HK416 and HK417 HQ
Top