10mm guns seem wildly different

Jayne

Jayne

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Just doing anti-anxiety therapy today and resizing some used 10mm brass. Most the head stamps are the same, but the condition of the individual pieces is wildly different. Some take almost nothing to resize, some are visibly bulged in strange places like the chamber was cut with a Dremel. Some have the glock 'smear' style primer indent, some are nice circles but way off center in the outer 1/3 of the primer, some look like they were poked with an old nail.

Don't remember seeing such a variety in such a small batch of any other caliber, so I'm just assuming that 10mm guns are more 'unique' than things built to a more main stream caliber and/or they're 90s guns which were of questionable quality.

Nice that these use LPPs, those I have in stock. :)

IMG_9268.JPG
 
Be careful about the primer size, I have seen some small primer 10mm. Usual culprits, Blazer and Federal.
 
I load .40 S&W & .10mm. I have experienced the same differences in resizing the brass I get in range pick-up.
The solution;
Redding makes a push through carbide sizing die set. WELL worth the money. it removes the base bulge. I always use lube on all my brass to make things easier,, but this die is a match saver.
 
contender said:
I load .40 S&W & .10mm. I have experienced the same differences in resizing the brass I get in range pick-up.
The solution;
Redding makes a push through carbide sizing die set. WELL worth the money. it removes the base bulge. I always use lube on all my brass to make things easier,, but this die is a match saver.
Click to expand...
I find enough 40 that I don't bother using the ones that are bulged. However, the 10mm are scarce (and my 10mm tends to launch cases into the next county) so they are worth saving.
 
I too have plenty of .40 brass,, but when loading match ammo,, you can easily miss one,, and it can cause a gun jam. I just go ahead & push through size all on the .40s & 10mm's & it eliminates that potential issue.
 
10mm is my favorite caliber. I have several of them. Including Glocks, an AR, a Coonan and a revolver.

thankfully I reload.
 
Lee Factory Crimp die sizes entire case and removes bulges regardless of crimp adjustment.

Just screw the die body all the way down against the shellholder [even a bit too much as the press stretches a couple .001"s under load] then adjust desired crimp from the top.

Have a G20 and factory chamber leaves love handles in brass. KKM bbl fixed that issue but FCD fixes bulges cases.
 
Last edited:
Jmoser said:
Lee Factory Crimp die sizes entire case and removes bulges regardless of crimp adjustment.

Just screw the die body all the way down against the shellholder [even a bit too much as the press stretches a couple .001"s under load] then adjust desired crimp from the top.

Have a G20 and factory chamber leaves love handles in brass. KKM bbl fixed that issue but FCD fixes bulges cases.
Click to expand...

This right here!!
I’ve not done the barrel upgrades yet, but the FCD on a Lee turret works great! Zero issues (except for the very occasional cracked/split case) and close to 10K rounds loaded over 3-4 years...


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If you want to size the complete case, get the bulge-buster kit. Use it with the Lee FCD.
 
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