44 magnum "growing" on crimp

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44 magnum "growing" on crimp

Postby Ohio3Wheels » 05 Aug 2019 15

I'm loading some 44 mag for the Henry using Berry's plated 240 gr flat point. After setting the seating die and checking the length I crimp with the Lee FCD and re-measured and discovered that that one grew .004" in length. A few have been between .002 and .003 but most are right at .004. Not enough to affect feeding or anything just a curiosity and wondering if any body else has this experience.

Inquiring minds and all.

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Re: 44 magnum "growing" on crimp

Postby Ranch Dog » 05 Aug 2019 15

If it is a compressed load, it can do that. Otherwise, not enough neck tension. Are you using the Powder Through Expander die? If so, back off it just a wee bit. Not so much flair.
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Re: 44 magnum "growing" on crimp

Postby larryw » 05 Aug 2019 17

Ranch Dog wrote:If it is a compressed load, it can do that. Otherwise, not enough neck tension. Are you using the Powder Through Expander die? If so, back off it just a wee bit. Not so much flair.


Doesn't get anymore right than that !!!
Just one thought, be careful of the amount of crimp, the bullets being plated, just a slight
bit to much crimp will cut clear through the jacket (plating).
At least the regular plated will, I dont know about the double plated stuff.
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Re: 44 magnum "growing" on crimp

Postby Ohio3Wheels » 06 Aug 2019 09

Ranch Dog wrote:If it is a compressed load, it can do that. Otherwise, not enough neck tension. Are you using the Powder Through Expander die? If so, back off it just a wee bit. Not so much flair.


Not compressed middle of the road CFE Pistol

Yes on the expander it's adjusted that I can barely feel the flair and seating takes a little force

Crimp die is set so the collet doesn't close all the way so crimp is mild to my way of thinking

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Re: 44 magnum "growing" on crimp

Postby Macd » 06 Aug 2019 11

My experience with bullets lead, plated or jacketed is a variation in bullet profile. Even my Lapua bullets will vary a thousand or two when measured with a comparator. Seating punches tend to contact the sides of the bullet not the face so any variation in the bullet profile leads to variation in seating depth. I use FCD rifle dies and honestly have not checked to see if they themselves may measurably increase OAL. It would only take a minute to check lengths before and after crimping.

There is another issue I have had to address with my single stage Lee breech lock press. There is a fair amount of combined play and stretch/compression introduced by the linkage, threads and the O'ring. A loose breech lock bushing may turn slightly changing the amount of backlash. Some bushings are worse than others even when it comes to the fit of the locking pin in the cutout in the bushing rim. I have added shims to reduce backlash and used locking collars to eliminate the O'ring. I pondered replacing the locking pin with a tapered head machine screw but decided it was overkill. Darn OCD was kicking in I guess.
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