I have a 625 auto rim that i am getting way to must leading. So i am going to plated bullets how much crimp can put on them. I have a lot of bullet jump now with a light crimp. thanks

Not sure what you're calling a "light crimp" but what I do is measure the thickness of the brass at the case mouth, double that, measure bullet diameter, add the two and that's my finished size. For example:

case mouth - .012 x 2 = .024"
bullet Dia. - .3575"
.024"+.3575" = .3815" is my finished size

If I have problems with "jump" I might take it down another .001 max. Remember, anything below the original finished size you're deforming the bullet and/or damaging the plating. When you do that accuracy goes away.

I used 38 caliber in my example but I do the same for all of the calibers I load including .45acp. Also, I taper crimp everything. I don't use a roll crimp on anything because if you don't roll into the crimp groove or if the bullet you're using doesn't have one then the edge being rolled is cutting into the bullet again hurting accuracy.

You might want to try coated bullets instead of plated. They're a little cheaper, just as accurate, and I've never had a leading problem with them. I shoot "Bayou Bullets" but there are others.

I shoot a lot of Berry's 230 grain plated bullets in .45 Auto.
I taper crimp them with a Lee Factory Crimp Die to .471".
Never had a problem with that.
Can't see why this would not also work for the Auto Rim case.
OTOH, I am squeamish about roll crimping these bullets without a cannelure.
Some do it, for sure, but for revolvers I just stay with lead bullets.

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-jwk-
US Army '72-'95

I just measured some 45acp I reloaded last week and got .471 - .4715

I swear by lee taper crimp dies on my auto's and factory crimp dies on my revolver loads. The great thing is they pass by a carbide sizing ring as the pass back out of the die. That way the crimps is always perfect. Even if you over crimp and buldge the case it will be resized as it exits the die and the cartridge will always fit the cylinder/barrel. Its an extra step but well worth it. Just my experience,,,,

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Bob
Sic Semper Tyrannis

Too much crimp on any plated bullet will destroy accuracy. SO pull a crimped bullet, if there is a noticeable ring or crimp line, that is too much. FWIW, the LFCD is HORRIBLE for plated bullets. I have found it degrades accuracy by resizing the bullet inside the case. This is brass dependant but using mixed brass, this was my test result, from 50ft. For some, they wouldn't care but for me, that is very telling. So no LFCD for me, ever.

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NRA Cert. Inst. IDPA CSO