9mm problem reloads

[m657]

with otherwise flawless Glock 34:

just loaded a bunch of 9mm 115 FMJ with 4.4g W231.

Seemed within spec in hodgdon data tables.

Rounds are physically correct for chamber fit.

Problem is mostly I get a failure to extract fully or eject, some stovepipe like jams.

If I run the slide manually, all the rounds will chamber and eject properly.

If I use some commercial 124 g FMJ, no issue noted.

Never had any issue with this fairly new pistol with other ammo.

What's the problem?

Sort of at a loss on 'what did I do wrong?'

[m657]

with otherwise flawless Glock 34:

just loaded a bunch of 9mm 115 FMJ with 4.4g W231.

Seemed within spec in hodgdon data tables.

Rounds are physically correct for chamber fit.

Problem is mostly I get a failure to extract fully or eject, some stovepipe like jams.

If I run the slide manually, all the rounds will chamber and eject properly.

If I use some commercial 124 g FMJ, no issue noted.

Never had any issue with this fairly new pistol with other ammo.

What's the problem?

Sort of at a loss on 'what did I do wrong?'

[magnum12pm]

It is possible the powder charge is to low to cycle the slide all the way back with enough force to properly eject the case. I had the same problem with my 1911 pro series, while loading exactly as the manual said. Its best to always check more than one source for loading data. I only had to move up half a grain for proper ejection. Just remember to move up in small increments, testing your reloads each time until you get results you desire. This is why you always want to test out a few, so you don't end up with a thousand un-useable rounds.

[Sgt Preston]

Sgt Preston here. I'm also guessing you simply need more horse power. Hornady lists a MAX of 4.7 grains x 1.100 OAL = 1100 FPS, so go carefully.

[OKFC05]

Been there done that.

Try about 4.8gr with the 115gr bullet, about 4.5 with the 124.
It's perfectly fine to go a little into +P territory, and the loads match a G34.

That also gives you legal minor loads for IDPA and USPSA Production.

[m657]

Thanks for the tips gents.

Who wouldda thought what was a mid-range load in hodgdon site would be such a wimp?

Also, the other manuals I checked all seemed to consider this a 'mid-range' charge.

I'm all out of W231 now in any case. We'll see how the old Tite Group works. And I'm bumping it up a notch with 124s also.

Anyone got a 9mm revolver cheap?

[Sgt Preston]

Sgt Preston back again. I seem to recall that my Glock G34 had a "heavy recoil spring" = 18-20 lbs. On a "1911" type gun you could simply change your recoil spring to use a lighter weight spring to compensate for the "light" load. I don't know about optional springs or the results for the Glock. Preston

[il Padrino]

4.4 gr 231 may be a bit low, I was reloading some 115 gr 9mm rounds for my brother and using 4.5 gr 231 and he was encountring the same problem, I kept increasing the powder charge until he no longer had eject or stove pipe problems, I ended up going to 4.9 gr W231 to get the pistol to cycle and eject reliably. My suggestion is to load up a small batch incresasing the load by a half without exceeding the max limit (my Winchester load book lists 4.9 as the max) and see what load works best with your particular gun.