Confused with the 9mm

fetchingdrake

fetchingdrake

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Need some help here guys.
It's my first time loading pistol, have loaded bottleneck rifle for the last two years.

With regards to trim to length for the 9mm cases my manual says .754. Yet when I resize my cases are .748. Is this going to be a problem as they headspace off the mouth.

I also am confused at overall length, should I seat to maximum oal length as listed or follow for the 124 grain bullet?

To add more confusion I just resized 200 case with my new 4 die carbide from lyman. On completion I see thevresizing die is stamped 9mm makarov. All the other. Taper crimp, seating and mouth expander dies are 9mm luger....... I've put the calipers on the sized case and loaded a couple dummies to see if they will chamber and they do? I am thinking that they just stamped the sizing die

just confused as its my first time with straight walled pistol cases.

I will try to post pictures in a bit. Any and all feedback welcome!!

Thanks
 
i never size any pistol/straight wall cartridges, not worth the time and no need.
i reload for 9mm, 45acp, 38 spl, 357 mag, S&W500.


OAL isn't super important, just make sure the rounds fit your chamber/mags.

i mess around with various lengths and bullets, i just go by weight. eg i'm loading 150 grain .358 SWC's DRG's in my 9mm for my glock. they shoot just fine, no leading.

just make sure to use starting loads and not max loads when messing around with things.
 
Don't worry about trim length on pistol cartridges. It's not needed as a few others have said.

What's more important is your OAL. In my 9mm different bullets forced me to change the OAL to get the round to chamber properly.

When starting with a new barrel and/or bullet I start by making a dummy round at the max listed OAL, then drop it into the barrel. Adjust seating depth until the round chambers properly. Pay close attention to your length and powder charge. A safe load near max OAL will be dangerous at OAL's that are shorter so be careful. The 9mm can over pressure very quickly.

Also ensure you have a good crimp on it to avoid bullet setback when loading and again putting you in an over pressure situation.

Once you have a good OAL for YOUR BARREL put a light crimp on it and rack it into your firearm. Remove and re-measure. If your OAL has dropped enough to worry you then make another dummy and put a tighter crimp on it and repeat.

Remember only crimp enough to prevent bullet setback. All guns are different. For my 9mm I need to good crimp, but for now sold 4506 (sad to see it go) I needed almost no crimp.

Hope this helps.

Later.
 
The 9x19 and the 9mm Makarov are close in size but not identical. I suspect Lyman included the wrong die in your set. My suggestion is to email them and ask their opinion. If it matters, they should replace it for free.
 
The makarov should be 9x18. the luger will be 9x19 that die may explane the short case length.
I would get it changed.

Also the makarov takes a slightly bigger bullet.
 
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