XDM 9mm reloads


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Paul M
August 14, 2012, 06:21 PM
I am a recent reloader, I have been successful with reloading 38s for my revolver but am having problems with the 9mm reloads.
I have RCBS equipment and dies..numerous spec charts and try to make the 9s to copy factory measurements but the rounds I have made are not right.
They fit in the magazines and load into the chamber but will not extract. For reasons I do not understand they jam and will not allow me to pull the slide back. After several attempts to get the slide back (lots of tugging at it) it will come back and lock and the round is loose but scratched.
I have tried this several times. I recheck the measurements but still the reloads will not function properly.
After ruining the cases of the malfunctions while trying to get this corrected I think I must be missing something.
I am using "Hornady 9mm 124gr XTP bullets and Federal and Winchester brass
with a few exceptions found at my local range.
What am I doing wrong? Any advice will be gratefully received.

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bodam
August 14, 2012, 06:43 PM
ugh, had a very similar problem. It all came down to OAl and the bullet getting stuck in the barrel rifling. The 9mm XD has a strange chamber it seems.

My problem was round nose bullets being too wide for the length that I made them. I had to shrink the OAL down and adjust the powder for the new pressures

rcmodel
August 14, 2012, 06:48 PM
+1

Take the barrel out of the gun and use it at the bench as a gage.

Do the "Plunk Test" and keep seating shorter until it will drop in with a plunk, and fall back out of it's own weight.

Alternately, you can color a loaded round with a dry erase marker and try to chamber it.
Where the marker rubs off?
That right there is the problem.

On the off chance it's not OAL, but not enough taper crimp?
Use your calipers to measure the case mouth after loading.

It should measure .376", no more, no less, to match factory ammo crimp.

rc

browningguy
August 14, 2012, 08:29 PM
XD's have the same chamber as every other 9mm pistol, there is a SAAMI spec for 9mm. As mentioned above the problem is probably with the taper crimp and case mouth dimension.

bodam
August 14, 2012, 11:35 PM
The loads I made with the lead round nose work in other 9mm guns, just not in the XD. They fire fine in my LC9 and a M&P, but jam in the XD, so I think there are slight differences in the chamber.

Same OAL with plated parrabellum bullets work perfectly in the XD. Weird.

Deus Machina
August 15, 2012, 08:38 AM
XD's have the same chamber as every other 9mm pistol, there is a SAAMI spec for 9mm. As mentioned above the problem is probably with the taper crimp and case mouth dimension.

SAAMI specs include a range. It's very possible to load a round to the top of that range and not have it function well in a gun at the tight end. Glocks, on the other hand, could be rattle-tastically on the loose end.

I had this exact same issue with a CZ75, which are notorious for it with reloaders. I'm not sure if SAAMI covers it, but the throat at the chamber end of the rifling was too steep, or did not extend far enough. Thus, loading a cast lead round-nose that worked perfectly fine in every other gun I or my friends owned, would lodge hard into the CZ.

The solution was to lighten the load and shorten the OAL a little, then work back up. Eventually, I switched to a mold that had a little step and sharper nose, and the problem ceased altogether.

340PD
August 15, 2012, 10:12 AM
1. Do the "plunk" test using your barrel. 9mm seems to have quite a wide variation on OAL.

http://www.youtube.com/watch?v=cdJLNox1hpk

2. Are you using a seating die and then a separate taper crimp?
If not that will help.Once you find a good compromise on OAL.

rcmodel
August 15, 2012, 01:43 PM
XD's have the same chamber as every other 9mm pistol, there is a SAAMI spec for 9mm.No they are not all the same.
Lots of guns, including the XD, have short chamber leades cut for FMJ-RN military type bullets.

The OP is loading Hornady JHP, which have a different profile then FMJ-RN, so they need to be seated shorter to clear the leade.

rc

stavman11
May 28, 2013, 05:44 PM
Sorry ta Pull up an old thread Guys... but again.. the search Function.... well Google helped me out... thanks THR

Seems the OAL on my rounds would not work correctly in my XDM and where spot on with my Ruger LC9C...

Did the plunk test when i got Home... the factory.. 115gr Frangible all worked great... but the 115gr RN would stick and not go In...

OAL was 1.15... so at 1.12 there where Perfect


thanks again THR for the Help

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