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Old 10-28-2010, 01:57 AM   #21
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Default Trim pistol cases??

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Originally Posted by Highpower View Post
Are you trimming your cases to a uniform length after sizing?
Who trims pistol cases?? Very few that I know. I believe that this is a die adjust problem.


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Old 10-28-2010, 02:02 AM   #22
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Default Seating+crimping..

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Originally Posted by spittinfire View Post
That's what I thought at first too so I readjusted it and on the third try it did it again.
I know it is an extra step spitty but I seat to the cannelure and the next step I install a just firm enough roll crimp. I have not had good luck seating+crimping in the same operation.


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Old 10-28-2010, 02:16 AM   #23
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Default BS Meter is right!!!

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Originally Posted by Shade View Post
BZZZZZZZZZZZZ goes the BS meter....

Straight walls grow but not as fast or as much as bottle necked cases.

I do not have time to discuss the details right now, will later.

But you solution is the Lee Factory crimp die. I will explain later also.

The short answers is slight variation if case length, unless you trimmed
them all they will vary by a few thou. Taper crimps are very sensitive to
case length. The Lee Factory crimp die is not.
1. Yes straight wall cases will vary a couple of thou.
2. NO-Taper crimps are NOT as sensitive to case length as roll crimps are.
3. The first contact of a Lee FCD does taper crimp, and then, on revolver dies progresses into a roll crimp. Adjust down a Lee FCD to where it roll crimps.
Your first post was right--you do not have enough time to give out incorrect information to forum members..
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Old 10-28-2010, 12:51 PM   #24
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Quote:
Originally Posted by BILLYBOB44 View Post
I know it is an extra step spitty but I seat to the cannelure and the next step I install a just firm enough roll crimp. I have not had good luck seating+crimping in the same operation.
I'm beginning to think my issue is with the bullets themselves. When I seat them to the specified depth they are not into the cannelure yet. When I crimp them, they pull themselves into the cannelure but I end up with an OAL that is too short.
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Old 10-28-2010, 01:46 PM   #25
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Originally Posted by BILLYBOB44 View Post
Who trims pistol cases?? Very few that I know.
But you admit, you DO know a few that do.

I'm just an anal twit who does it because I like to have a uniform roll crimp in the center of a cannelure if the bullet has one. I don't fret so much about the OAL on revolver rounds. But the specifics were not presented in the original post about checking for uniform case length or what type of crimp was being used - so I asked. My mistake.

As you were.
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Old 10-28-2010, 06:50 PM   #26
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Quote:
Originally Posted by Highpower View Post
But you admit, you DO know a few that do.

I'm just an anal twit who does it because I like to have a uniform roll crimp in the center of a cannelure if the bullet has one. I don't fret so much about the OAL on revolver rounds. But the specifics were not presented in the original post about checking for uniform case length or what type of crimp was being used - so I asked. My mistake.

As you were.
Hay, we're kool, High. Case trimming will put the crimp exactly where you want it.
If you are batch loading, you can measure the brass-short to long-+adjust your seater as you go.
I try to seat to the top edge of the cannelure on most of my loads, and firm roll crimp on my WW-296+H-110 loads. Slightly lighter crimp on most all other powders.
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Old 10-28-2010, 07:44 PM   #27
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Quote:
Originally Posted by BILLYBOB44 View Post
If you are batch loading, you can measure the brass-short to long-+adjust your seater as you go.
My! You ARE a glutton for punishment aren't you?

I just hate it when I get a good rhythm going and come across a long case that missed being checked or trimmed, and the thing folds up like an accordion when I go to crimp it. Just all part of the fun I guess.
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Old 10-31-2010, 04:34 AM   #28
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I keep seeing overall length which is a maximum measurement not a minimum on .357. I have some .357 duplex loads that are almost flush to the case mouth. Seat to the canelure.

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Old 10-31-2010, 12:40 PM   #29
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I keep seeing overall length which is a maximum measurement not a minimum on .357. I have some .357 duplex loads that are almost flush to the case mouth. Seat to the canelure.
I looked back at my data and it doesn't specify a min or max. If there is .015" of give on that number then these would be fine. It just makes me nervous when the case is nearly full and there isn't much room before I start compressing the powder.
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Old 10-31-2010, 01:15 PM   #30
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Spitty, there is a little bit of "give" allowed in the OAL of your rounds. But you don't want them so long as to have the bullet sticking out of the front of the cylinder on a revolver for obvious reasons.

For example, you could load a lead wad-cutter bullet seated flush with a .357 case mouth - or - you could load it sticking partially out of .38 spl case to get the same jump to the cylinder throat as with the .357 case.

As long as you are within the book specs for your powder charges, lightly compressed loads aren't a problem.



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