crimping

[h.charlie]

I'm having trouble getting the right crimp on my 25 remington reloads, as the case are all different sizes + or- .01", and I am trying to roll crimp them, for ****s and giggle one that I botch I decided to try and run it threw the sizing die by removing exspander, and decapping pin assembly after running it threw this left a ring around the top like a light standard crimp Ill get pics in a minute to show but has anyone tried this or have any knowledge on this? The one on the left is ran threw the sizing die and the one on the right has a roll crimp as best as i could get with out pushing the shoulder down

[BigBronco]

If you want a good consistent crimp the brass needs to be the same length. I am sure you realize that now

[h.charlie]

I knew that before hand, The problem lies that i do not have a trimmer for 25 remington and these case are all sized down from 30 rem brass, so taking a file and getting them within a 1/100 of a inch by hand is the best i can do, then i just have to adjust the crimp for every round. The point of the post is has anyone ever tryed using the sizing die like explained or have any knowledge on it

[ar15barrels]

Do I understand correctly that you ran a LOADED cartridge into the sizing die with the expander/decapping stem removed?

[h.charlie]

Yes that is correct, but not the whole case I back the die out so that the only part that makes contact is the top 16th of a inch of the neck to leave what is pictured and seems to work as a crimp. I could see the alarm if it was fully resized but the primer is no where near the die and there are no new tool marks on the side of the case wall

[ar15barrels]

Yes that is correct, but not the whole case I back the die out so that the only part that makes contact is the top 16th of a inch of the neck to leave what is pictured and seems to work as a crimp.

Ok, you are basically using it to taper crimp, but with a straight crimp.
Doing it that way is crushing the bullet in the crimped area more than a proper taper crimp die would.

My concern was that you were full length RE-SIZING a loaded round.
The issue with doing that is that you are squeezing the full length of the bullet in the neck down in size and the bullets will usually be loose in the case neck afterwards.
The other issue that happens is you could get the loaded round actually stuck in the die.

[J-cat]

And how is that more consistent than using your seater die???

[bigedp51]

If you seat your bullet deeper you will be crimping in the bullet crimping groove where it belongs and not deform the bullet.

[h.charlie]

When using the seating/crimp die the die had to be adjusted for every case as I don't have the right case trimmer yet. So some would be perfect some light if any crimp and then some would bulge out the shoulder, at least by using the sizing die I could tell when the neck started to size and then stop when it felt like it needed more pressure, needing the extra pressure as it was trying to crimp past the cannula. If had the right gear to do everything proper I would but I have make do with what I have and was curious to see what others thought or if the have ever tried this or heard of anyone doing it

[h.charlie]

If you seat your bullet deeper you will be crimping in the bullet crimping groove where it belongs and not deform the bullet.

Nothing has been said of deforming bullets just cases do to using poorly trimmed brass that was necks sized down from 30rem and if I also seat them deeper it would rise chamber pressure witch I would say in a gun that's over a 105 years old is bad

[ar15barrels]

Nothing has been said of deforming bullets

Perhaps nothing was understood, but it was indeed said.

Ok, you are basically using it to taper crimp, but with a straight crimp.
Doing it that way is crushing the bullet in the crimped area more than a proper taper crimp die would.

The deformed cases you were getting were from excessive crimp.
This stuff is all covered in good reloading manuals.

[JagerDog]

You don't state the rifle. If box magazine, I'd forgo the crimping..at least until I got them trimmed up proper.

[h.charlie]

When pulled, the bullets are not deformed I will post a pic when I get I chance, I have not said anything of deformed bullets in fact I believe I said it looks like a light standard crimp, In my experimenting last night I tried to run a unusable case as far as it could go and I'll show a pic of that witch did deform the case but I don't know why you would need to run a crimp a 1/2" down the neck and thanks for stating what has already been known of why the shoulder is getting pushed back cause guess what they where poorly trimmed by hand the ones ran threw the sizing die shot just fine today better then the roll crimp as it had a more uniform crimp, it is a early model 8 where the crimp isn't considered a necessity but being a auto loader I'd say the safer choice especially sense it's 25rem but the gun is technically a 25 30 rem where it has this double shoulder in the breech that likes to catch tips of bullets I'll get a pic of a fired case next to a fully resized one so you can see what I am talking about

[h.charlie]

When pulled, the bullets are not deformed I will post a pic when I get I chance, I have not said anything of deformed bullets in fact I believe I said it looks like a light standard crimp, In my experimenting last night I tried to run a unusable case as far as it could go and I'll show a pic of that witch did deform the case but I don't know why you would need to run a crimp a 1/2" down the neck and thanks for stating what has already been known of why the shoulder is getting pushed back cause guess what they where poorly trimmed by hand the ones ran threw the sizing die shot just fine today better then the roll crimp as it had a more uniform crimp, it is a early model 8 where the crimp isn't considered a necessity but being a auto loader I'd say the safer choice especially sense it's 25rem but the gun is technically a 25 30 rem where it has this double shoulder in the breech that likes to catch tips of bullets I'll get a pic of a fired case next to a fully resized one so you can see what I am talking about

[h.charlie]

Here you go. 1 is of a fired case with the weird double shoulder, 2 is of a full length resized case, 3 is the case I had laying around that I used to find out the amount of pressure to apply before the bullet would get deformed the black mark on the side of the neck is how far I pushed it into the resizing die before the shoulder collapsed, 4 is the pulled bullet from case three it is clearly deformed after the cannula to the black mark near the base, number 5 is a bullet pulled from a round using the sizing die and the method I previously explained of once you feel it start to size then releasing all pressure on the press when it feels like it needs more pressure to continue