Anyone Else's PM9 or CM9 Jam on WWB Too?

[lserver30]

I've had my PM9 for about a year and a half now and have put at least 700+ rounds through it, so its well broken in, but it still jams on about 66%-75% of the boxes of Winchester White Box that I try to put through it. And its not like its dirty, it'll jam on the first round and I always meticulously clean my guns after shooting them. I'd shoot other stuff if WWB weren't so cheap and still brass cased. I'm just wondering if anyone else's PM or CM jams like mine?

[Nimrod]

Nope. My PM9 has never jammed. I always use WWB for practice. I use it in all of my guns because it is good quality and CHEAP. The only gun I have seen that had problem with WWB is the P380. It doesn't like them.

From your pictures it looks like the front of the bullets are catching below the feed ramp. Maybe it is a magizine problem. Does your gun do this with different magazines? Does it have problems with anyother ammunition?

[flatlander937]

I have that issue with Federal 115gr FMJ.

Take some calipers and measure the round's OAL.

I took some calipers to these kinds of ammo and grabbed 5 samples of each to compare.

My CM9 feeds the Federal just fine in my 6rd mags, but extended 7rd mag it jams about 75% of the time just like yours(nosedive UNDER feed ramp). Magtech and Aguila is no problem. I've shot 115gr Aguila as well with no problems at all, but I had none of that on me to compare.

Magtech was most consistent in OAL from one to another cartridge, Federal was on average the longest, and Aguila was the shortest on average by a good margin.

I also have about 80 rounds of 115gr JHP Remington which is WAAY shorter overall(haven't measured but it is easily another 0.150" shorter I'd guess... maybe even more) with no issues.




Here is a pic of the rounds compared... Notice the Federal is the "pointiest" or least rounded of them all? I suspect this may also play into my problems.




Next time I'm at the store, I'll get some WWB to measure next time for comparison.

[CrabbyAzz]

My CM9 shoots a steady diet of WWB & Tul Ammo without a problem.

[jocko]

a suggestion to chek out. U need to see if by chance ur magazine release is hitting ur magazne follower at about round 2/3. There is a description on how to check this out on the kahr tech section under propper pepping of ur kahr. takes 5 minutes tocheck it out and 5 minutes to fix it.

Also, I would suggest calling kahr and askinf for a new recoil assembly. U just might have a recoil assembly that is way out of whack. It is all about perfect timeing in a semi auto and quite possably a new recoil spring seems to solve alot of issue for guns. That wold be my frst or second place to start.

U just need to eliminate some possabilities and the above is two of them to check out. WWB is great ammo, that is about 95% of all ammo I have ever shot in ay of m,y kahrs. Wal mart 2 miles down the road provideds the best price for me. It isnot the ammo's fault.

Check ur magazines to see if by chance the magazine spring is in backwards. Little things can cause big issues n a semi and anya tme a gun doesn't fire IT IS A BIG ISSUE.

[JERRY]

my PM9 has been flawless with wwb using the flush fit 6 round or extended 7 round magazines.

[Rubb]

my PM9 has been flawless with wwb using the flush fit 6 round or extended 7 round magazines.

Mine too.

Never an issue with Federal either or my handloads @ 1.15.

[RRP]

Ok, so this is a little off-topic, but slightly related.

My P380 does not like flat nose WWB ammo. It tolerates the 50 count boxes, but the P380 will NOT feed the 100 round value pack. To quantify, the gun malfunctions at least 50% of the time with WWB, 100 round package. It malfunctions about 5% of the time when using the 50 round box.

As as result of this track record, I have stopped buying WWB for my 380, as well as for my 9mm. Though I have not shot WWB through my PM9, it has never failed, even when using cheap ammo, i.e. PMC, Blazer, etc. I have never fed steel ammo through my pistols. It would probably feed WWB ball ammo, but I have never tried.

[O'Dell]

My PM9 has never malfunctioned with WWB or Federal, but since they're both fairly weak loads, I seldom use them. Also, I never use extended mags. Before I got rid of it six years ago, my PF9 refused to load WWB at all. I measured the rounds and found that the Winchester's were longer than anything else I was using at the time.

[MEJETSKI2000]

Only issue I had was my own, a "vigorous" mag change, drove the nose on the first round down like that w WWB.Is it on initial chambering, second/third round ?? 6 or 7 rond mags ?

[Mechatricity]

I had this issue when i first got my CM9, it was user error for me. If i slam the mag in too hard, the first round will shift enough to catch the bottom of the feed ramp. make sure that top round in your mag is sitting back alll the way.

Watch the chamber when you slide a new mag in. The tolerance between the first round in the mag and the bottom of the feed ramp can be pretty tight, i agree that ammo may play a big role as well, as i've seen length differ enough to make the difference. I've never seen a round long enough to not fit between the back plate of the mag and the bottom of the feed ramp, but i've seen some that are really, really close.

No one will ever fault kahr for having loose manufacturing tolerances!

[AIRret]

I've never had a problem with WWB, and my seven round mag works great (I did let it sit loaded for at least a month). The only ammo I've had a problem with is Remington golden
Saber defensive rounds.

[gm412]

My PM 9 never jams and I have used WWB many times. At least 400 rounds. My PM9 has somewhere between 1500 and 2000 rounds through it. Mostly Federal.

[goose]

Have had no problems with WWB in my CM9 but I use only 6 round mags.

[JERRY]

i should have stated that my PM9 has been flawless with every type of ammo ive put throught it, but i just stated wwb at first because that was the issue with the OP's.