Roll crimp for 10mm

K

keithhagan

Member
Joined
Dec 23, 2018
Messages
221
Reaction score
129
I want to roll crimp some 10mm ammunition for shooting in my model 610. Naturally, no one manufactures a roll crimp die for 10mm auto, but ones for 38-40 and 40-65 are readily available.

38-40 uses the same bullet diameter as 10mm, but has a smaller neck (0.416").

40-65 uses a larger bullet, but it has the same size neck (0.423").

Which would do a better job? How are roll crimp dies sized, based on the neck size or bullet size (or both)? I'm leaning towards the 40-65 die, but not sure.
 
Register to hide this ad
Why a roll crimp? I know the 610 uses moon clips, but most semiauto cartridges use a taper crimp, so the case mouth can headspace the cartridge in a semiauto chamber. 10mm bullets don't usually have a cannelure for the rolled case mouth to fit, making a true roll difficult on bullets with a jacket. Plated or lead bullets are soft enough to deform a little when you crimp them, so there's that, but a taper crimp should hold the bullet securely.

Are you worried about setback?
 
The 40-65 die may be too long for the shorter 10 mm case to reach the crimping section of the longer die .
Be careful to buy a die that is the proper length ... shorter crimp dies can work , too long a die and the case mouth can't reach the crimping section ...then you have to start grinding the long die shorter... try to find something that works as is .

But first I would try 10mm bullets with a good taper crimp , use your existing dies , and see if it holds . Load six , fire 5 and check the last one for any "walking" .
I load some smooth sided 125 gr. 9 mm bullets in 357 magnum revolver and the taper crimp die from the 9 mm set holds them just fine .
If your 10 mm bullet doesn't have a crimp groove or cannelure ...you will not get a decent roll crimp ... no place for the roll to go and the case will bulge... no groove or cannelure ...a taper crimp will be better .
Gary
 
+1 that hair trigger provided excellent information on crimping a 10mm. Why would you want to roll on a cartridge designed for taper? You will find no bullets with a cannelure (crimp grove) designed for that cartridge.
 
Hair Trigger said:
Why a roll crimp? I know the 610 uses moon clips, but most semiauto cartridges use a taper crimp, so the case mouth can headspace the cartridge in a semiauto chamber. 10mm bullets don't usually have a cannelure for the rolled case mouth to fit, making a true roll difficult on bullets with a jacket. Plated or lead bullets are soft enough to deform a little when you crimp them, so there's that, but a taper crimp should hold the bullet securely.

Are you worried about setback?
Click to expand...

Fear not, I have plenty of .400 bullets with cannelures.

For the "why," the answer is simple: because the second amendment says that I can.
 
Erocksmash said:
Lee factory crimp die will roll crimp for you sir...
Click to expand...

Thanks, Erocksmash. I was under the (mis)impression that Lee factory crimp dies just gave an extra tight taper crimp for auto-loading cartridges. I had no idea that they gave roll crimps.
 
If your bullets have crimping grooves and these loads will only be used in a revolver and only with moon or half moon clips, then yes, you can use a roll crimp. Just don't use the roll crimp on any rounds that rely upon the case mouth for headspacing.
 
My 610 will headspace on the rim and shoot just fine with standard 10mm ammo. I have yet to load any, as I do not shoot it much, and then I have shot quite a bit with .40 S&W ammo with moon clips. Most of the 10mm empties just fall out and I would rather drag the remainder out than use moon clips. :-)

But, like you, I prefer a roll crimp on revolver bullets. I have a lot of .45 bullets for my 625 that have a crimp groove and I can use them in both the ACP and the .45 Colt cases.
 
Last edited:
10MM

Loaded 10mm for a 610 for years and a good stout load at that. Never needed to roll crimp for any reason. Still use the same load in my AMT long barrel, and Ruger SA's with no problem. But then I dont go looking for trouble, even though it may come my way. In loading for the 10 since the '80's I just have never had a problem with setback or anything else. JMHO :)
 
Neither caliber die will give you a roll crmp without grinding or milling them to 10mm length. If thst is what you want, use a 38-40 crimp/seat die.
 
Hair Trigger said:
I support your thoughts on 2A rights, but just as anything else in life, just because you can, doesn't mean you should.

Knock yourself out roll crimping a cartridge that doesn't need it.
Click to expand...

I appreciate your point, but this thread is about "how to roll crimp a 10mm" not "should one roll crimp a 10mm." For the benefit of those who might search for an answer to this question in the future, we should keep the thread on topic.

Your question of the value of roll crimping is worthwhile, and if you wanted to start another thread to discuss the pros and cons of a roll crimp vs taper crimp, I'd be happy to contribute.
 
The Lee Factory Carbide Crimp die for 40 S&W can apply a significant taper crimp. I have over crimped several 40 S&W cartridges that made bullet pulling a real challenge.
 
You must log in or register to reply here.

Similar threads

R
N330 load data for 10mm
Replies
1
Views
227
tlawler
tlawler
3rdgeargrndrr
Heavy roll crimp-
2
Replies
24
Views
2K
mtgianni
M
G
What Crimp die for 32 H&R?
Replies
8
Views
466
Brooks
B
johngalt
primer pocket crimp removal
2
Replies
39
Views
1K
Dennis2149
D
AJ
S&B 10MM Cases
2
Replies
21
Views
985
stansdds
S

Latest posts

Back
Top