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Measuring crimp.

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Jack H
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Measuring crimp. Empty Measuring crimp.

Post by Wobbley Sat Sep 16, 2023 8:53 pm

For those struggling on how to measure the crimp diameter in taper crimped 45, I offer my technique.  I rest the caliper on my finger and pinch the round between the finger and the thumb.  I use the beveled area of the caliper measuring jaws.  With this technique I can raise or lower the area to be measured to get the best npmeasurement.  It isn’t precise on a tapered crimp but it is repeatable and lot-to-lot comparable. Measuring crimp. Img_0312
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Post by Pinetree Sat Sep 16, 2023 10:58 pm

That's how I do it.

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Post by Wes Lorenz Sat Sep 16, 2023 11:31 pm

t's a bit easier if you set the caliper to the dimension you want and lock it down. When the cartridge goes thru you are where you want to be.

I made this to make it even easier. Someone should make some to sell.

Measuring crimp. Cimg0516


Last edited by Wes Lorenz on Sat Sep 16, 2023 11:33 pm; edited 1 time in total (Reason for editing : sent too many pics)

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Post by donp Sun Sep 17, 2023 8:55 am

Nice set-up Wes!

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Post by Black_Talon Sun Sep 17, 2023 10:11 pm

Wes Lorenz wrote: Someone should make some to sell.


Sounds like a great idea! How much would you charge for one?
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Post by noylj Sat Sep 30, 2023 5:20 am

Never measured a crimp. All I want is to remove case mouth flare and have cartridges that chambers freely.

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Post by Dpswift Tue Oct 03, 2023 9:11 pm

That gauge would sure make life easier.

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Post by only_8_ring Wed Oct 04, 2023 7:29 pm

Wes, not sure if you're joking, but uh... I'd buy one of those. You have any extra lying around?

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Post by Rodger Barthlow Wed Oct 04, 2023 8:02 pm

Very nice but I would need one to go as low as .463".
I find with the lighter powder charges I get a cleaner powder burn with a tighter crimp.
Very nicely done and yeah I would be interested also.
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Post by Jack H Wed Oct 04, 2023 10:52 pm

When I was 20 Coach told me to increase crimp until I could not push the bullet in with my thumb with the round standing on the bench.
We were not very technical back then.

Now I have a table swing arm light with a magnifying glass.  With the light and glass I can caliper right on the end of the brass.  In fact I can see to put the thin tip of the caliper half on half off the brass.
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Post by whitel Thu Oct 12, 2023 12:45 pm

Wobbley wrote:For those struggling on how to measure the crimp diameter in taper crimped 45, I offer my technique.  I rest the caliper on my finger and pinch the round between the finger and the thumb.  I use the beveled area of the caliper measuring jaws.  With this technique I can raise or lower the area to be measured to get the best npmeasurement.  It isn’t precise on a tapered crimp but it is repeatable and lot-to-lot comparable. Measuring crimp. Img_0312
Thanks for showing how to measure the crimp in .45. Your method, with the caliper and your fingers, makes it easier to keep the measurements the same each time, even if it's not super exact. It's a useful tip!

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Post by WesG Thu Oct 12, 2023 9:32 pm

I was gonna make me one on my last trip to pet my machines. Yeah, pure evil blind theft of intellectual property.

Maybe next month, or whenever I get back.

Spent most of my time working on rifle stuff ...

Oh, the humanity ...

:-)

But made a ton of custom seating stems for 38, and 45. And a .358 105 HB from Bear Creek, which I'm hoping will cure the leading in my 929, and maybe my 70's HP ... if they'll chamber.

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Post by Dub Wed Nov 29, 2023 10:03 pm

Wobbley wrote:For those struggling on how to measure the crimp diameter in taper crimped 45, I offer my technique.  I rest the caliper on my finger and pinch the round between the finger and the thumb.  I use the beveled area of the caliper measuring jaws.  With this technique I can raise or lower the area to be measured to get the best npmeasurement.  It isn’t precise on a tapered crimp but it is repeatable and lot-to-lot comparable. Measuring crimp. Img_0312




Thank you.  Measuring crimp. 2935285009

This was the first post I read after joining.....and it was very useful.

That is going to speed up checking my crimp. 

Just now getting back into handloading finds me checking everything frequently....don't want to make any mistakes and I HATE pulling bullets on goof ups.  pale
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Measuring crimp. Empty Ring gage

Post by SonOfSwede Sat Dec 02, 2023 6:10 pm

The gage block Wes shows is basically 5 ring gages in a block.

You can get any size you want at McMaster.com and search for ring gage.  Not cheep but they work.  I push the loaded round in with a small force and consider if they stay in place upside down they are good.

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