Jumping the crimp?

Interesting point-out guys. I thought the gap showed pretty well, at least on the right side, but I can certainly lighten it a bit. Probably depends on how high your screen brightness is.

{Edit: I changed it. Please take another look.}


The Possum,

Sorry, I had to pull the image. You can put a URL link to it so others can view it there, but not hot link it to the page here.

The crimps looked like they were made by a Lee Collet-Style Crimp Die. They make one for the 460.
 
Not to sidetrack the discussion but if you have made & fired MANY rounds of .460 using Lil'Gun, I think the best plan is to shoot as many more as possible as soon as you can.

Because the Lil'Gun is going to destroy that barrel, so do it ASAP and have S&W replace it ASAP under warranty, and when the revolver comes back, make sure the Lil'Gun never gets near it ever again.

Freedom Arms in Wyoming, they of the .454 Casull and elite single action revolvers have done all the testing on Lil'Gun necessary to close the file on this case. The stuff destroys revolver barrels.
 
Yes, you do! It's your .460 Revolver!!

Question #1, what number was the round that jumped crimp? 2? 3? 4? 5?

#2: was it ONLY that one round, or did any others show signs, ?

#3: Have you repeated the test? Could it have been a fluke??

Is the problem consistent?? Or did it only happen the one time??

If you are shooting other rounds, with the same load, loaded the same way, and only one of them jumps crimp, write it off as a bad round, and toss the case in the recycle or in the "only use after the end of the world when all the good cases are used up" stash. (you know you have one, )

IF the problem shows up regularly, THEN you need to look at doing something different with either your load, or your ammo construction.

AND, be aware that no matter what you do, there are certain combinations of things that just cannot be made to work "right", despite the fact that we think they ought to...
Click to expand...

It was the last round in the cylinder that jumped. So I shot four, and the last one jumped.

It was only the one round. I shot about twenty of them and just the one jumped. I went back and re-crimped the others with my Redding crimp die and they now have quite a lot more crimp than before.

It could have been a fluke but I am very disciplined about trimming and sizing etc so outside of normal variances it could have been the bullet itself was undersized I suppose.

Not to sidetrack the discussion but if you have made & fired MANY rounds of .460 using Lil'Gun, I think the best plan is to shoot as many more as possible as soon as you can.

Because the Lil'Gun is going to destroy that barrel, so do it ASAP and have S&W replace it ASAP under warranty, and when the revolver comes back, make sure the Lil'Gun never gets near it ever again.

Freedom Arms in Wyoming, they of the .454 Casull and elite single action revolvers have done all the testing on Lil'Gun necessary to close the file on this case. The stuff destroys revolver barrels.
Click to expand...

I'm not sure what is a lot? A few hundred I suppose. I haven't noticed any visible wear while cleaning but will look into it further. As I said, I do have several other powders to choose from.

Thanks for the tip.
 
Unclenick, the gap shows up better to my eye now. I saw it the first time, but I think your tweak made it more obvious. I'm a shutterbug and play round with Photoshop a bit, so I think about those things more than most, I guess.
 
This is what I see.
A second look at those two brass crimp edges. My suggestion: Screw the seating dies stem out a thousands or so in depth. So to crimp the brass's mouth into the CENTER of its crimp groove.

Crimping in such way. {Taper crimp} Although easy on the brass. Isn't really the correct crimp to use on straight wall high psi cartridges. [65000 psi in this case.] A Roll crimp built into most seating dies would be plenty sufficient in keeping its bullet stationary.
 
And then: Dillon suggested seating and crimping on the same station was a bad habit. They suggested seating first and then crimping. Problem! For me, I had two RCBS Piggy back 11 presses and a Dillon 550B, the Dillon 550 has 4 positions and I refuse to load on a progressive press without a lock out die and or a powder die. That created another problem, the Piggy Back 1& 11 will not load anything taller than the 223 Remington.

It was about this time I discovered my Piggy Back type presses had one way clutches, that matters not to anyone but me because all of my cam over presses have a ram that changes directions when the ram reaches the top. I know, all involved are confused but my Rock Chuckers (used to run the Piggy Back attachments) do not/can not cam over.

I was not shocked but I was surprised when the ram fell out the bottom of one of my Rock Chuckers, I called RCBSm they said they would send me a new one and I had to ask; "A new what?" I was not going to give up my Rock Chucker for an Import and with all of the tools and reamers, lathes etc. I figured I could ream the holes and make a larger pin.

They sent me a new ram, pin kit etc. and that Rock Chucker after replacing all of those parts will not cam over, after all these years.

F. Guffey
 
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