So went to chamber some 150 grain federal hst's(micro) in my 9c at the range the other day and the gun just froze on the first 2 rounds going out of the mag. Could not drop the mag couldn't rack the slide to the rear nothing. Eventually with an extremely stupid amount of force ripped the slide to the rear and ejected the first round to experience the exact same thing with the next. After the first 2 hang ups the gun shot the rest of the ammo fine. Has me very concerned though. Do not want a lock like that if I need to draw my weapon. Any ideas as to why this might of happened???[
M&P 9c hard lock.
- Thread starter Vsmith
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silversport
Member
that would tell me that the HST 150gr round and your M&P 9c are not compatible with each other...have you had this issue with any more conventional 9mm cartridges???
Bill
Bill
gwpercle
Member
Most likely the bullet is jamming in the rifling before fully chambering. Those two were just long enough to jam , if you measure a box of factory ammo the OAL will vary and the long ones are problematic. Try another bullet.
These new 9mm's seem to have little or no throat , the unrifled area just before the rifling starts. Heavier bullets that are longer in the ogive tend to do this. When they jam , they are a bear to get extracted, just like you experienced.
You are going to have to use different ammo in that pistol , try one loaded with 124 grain bullets. 9mm pistols are ammo sensitive. I just went through developing hand loads for 4 different 9mm's , the newer and smaller the gun the harder it was to get proper feeding. The answer for all was 124 grain truncated cone bullets seated deep enough not to jam.
You can test ammo buy loading a magazine with 4-5 rounds and manually cycling them through the gun, chances are if they don't jam , the rounds seat fully and extract under manual operation , they will function under live fire.
Point the gun in a safe direction while doing this.
Gary
These new 9mm's seem to have little or no throat , the unrifled area just before the rifling starts. Heavier bullets that are longer in the ogive tend to do this. When they jam , they are a bear to get extracted, just like you experienced.
You are going to have to use different ammo in that pistol , try one loaded with 124 grain bullets. 9mm pistols are ammo sensitive. I just went through developing hand loads for 4 different 9mm's , the newer and smaller the gun the harder it was to get proper feeding. The answer for all was 124 grain truncated cone bullets seated deep enough not to jam.
You can test ammo buy loading a magazine with 4-5 rounds and manually cycling them through the gun, chances are if they don't jam , the rounds seat fully and extract under manual operation , they will function under live fire.
Point the gun in a safe direction while doing this.
Gary
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I have shot quite a few other defensive ammo's through it and have not experienced this. It feed 147 hst's and gold dots just fine along with 124 hst and gold dots. These two jams were the only 2 I've experienced since I got the firearm. I normally carry 124 +P hst's but I do occasionally switch them with the 147 hst's. But to answer the question about me keeping the rounds I did not, they ejected past the firing line and I wasn't gonna get them. I still trust this gun, just not this gun with that ammo.
Brucenterry
Member
Like gwpercle stated, the heavier bullet is the issue....they are longer. Take the barrel out of the gun and drop a 124 gr bullet in that works and you'll hear it "plunk" and seat completely. Then confirm that it will spin freely in the barrel. Then try the 150 gr and I bet it won't plunk and seat w/out forcing it, and it definitely won't spin. It's hitting the rifling in the barrel and this is bad.
Go back to using your 124/147's HST's and they should be fine.
Go back to using your 124/147's HST's and they should be fine.
zoso68
Member
....and there's your answer..............
