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Let’s talk Crimp

I know I have to use a heavy crimp on a S&W 500 but my question is how much? I have been using a three die Lee set and just purchased a Lee Factory Crimp Die. I just don’t know how much is to much or to little. I realize if the bullet works free under recoil that’s to little. Outside of that how do I tell? I also realize tighter crimp will increase pressure which is my main concern, using to much. Thoughts?
 
I know I have to use a heavy crimp on a S&W 500 but my question is how much? I have been using a three die Lee set and just purchased a Lee Factory Crimp Die. I just don’t know how much is to much or to little. I realize if the bullet works free under recoil that’s to little. Outside of that how do I tell? I also realize tighter crimp will increase pressure which is my main concern, using to much. Thoughts?

 
I don’t know anything about loads for your caliber.
I use a Lee factory crimp on my 223 rounds, you really don’t want to see hardly any crimp with the naked eye. I measure the diameter of the case with calipers and then compare that to what the little crimp intentions measure, .003 or there about under the full case diameter has worked for me.
 
I know the instructions say 1/2 turn in from shell holder contact, but I have found for revolvers 1/8- to 1/4 was fine(38-357's with 125-150 gr jacketed bullets). 1/2 turn with Berrys plated, I had debris.
 
During load development in my 454, i ran into squibs using A-1680 powder. Bullet lodged 1/3 down the bore. I also had partially burned powder grains in bore and case. Contacted western powders and gave my load data. Got a call back a week later and they said they couldnt duplicate my condition. They’re theory was too light of a crimp. I had a heavy crimp from my lee fcd. I just changed to an easier to ignite powder and solved the issue.
With a 500, id use as heavy a crimp as i could without deforming the jacketed bullet.
 
During load development in my 454, i ran into squibs using A-1680 powder. Bullet lodged 1/3 down the bore. I also had partially burned powder grains in bore and case. Contacted western powders and gave my load data. Got a call back a week later and they said they couldnt duplicate my condition. They’re theory was too light of a crimp. I had a heavy crimp from my lee fcd. I just changed to an easier to ignite powder and solved the issue.
With a 500, id use as heavy a crimp as i could without deforming the jacketed bullet.
That’s my plan to get them crimped and tight as I can with out damage. I am using H110 and mag rifle primer. As of now no pressure signs will see if that changes with heavier crimp. Also curious if velocity changes.
 

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