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Ruger P90DC Problem

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Ronvandyn:

--- Quote from: Mudinyeri on December 09, 2010, 12:44:55 PM ---Just to be clear, the gun only does this with a round in the chamber?

--- End quote ---

Actually its when trying to chamber a round into the chamber.

Ron

Ronvandyn:
Well I double checked a few things on this problem.  The loads I was firing were pretty light, just target loads really, so I loaded a few near max load rounds and went off to the range.  Same problem.  I verified that the cases were properly sized when I loaded them so I knew that sizing was not the problem. 

Same problem.  *&_&%E!!!!  Well frack.  Went back to MidwayUSA and found that they sell non-manufacturer springs that are considerably stronger.  Wolf Slide Springs.  Never heard of them myself, but for less than $10 I can afford to experiment a bit.  Should be in this week, then off to the range next week. 

Ron

Dan W:
Wolff gun springs are the best you can buy and they generally have sets that allow for stock replacement or others that are designed to fix problems

Ronvandyn:

--- Quote from: Dan W on April 09, 2011, 03:42:19 PM ---Wolff gun springs are the best you can buy and they generally have sets that allow for stock replacement or others that are designed to fix problems

--- End quote ---

Well Dan it didn’t fix the problem.  Blast it all.  I am putting it all down here to get it straight in my own head and maybe to get some advice from the old-salts that hang out here.

After another disappointing day at the range I came back to the house and pondered my problem.  I had a box of Winchester White Box ammo and decided to see if I had missed something.  Indeed I had.  50 rounds later without a mishap or stoppage of any kind I decided that I had missed something when I was reloading. 

I came back to the house and pondered some more.  The problem MUST be the casing, I know without a doubt that I am doing everything else correctly.  So I decided to map out the cases.  By that I mean I took my Micrometer and measured every single aspect of the cases, fired and empty, reloaded, and factory Winchester White Box.  Top to bottom, circumference, every which way I could think of.  One thing stood out. 

The reloaded rounds measure .472 at the top(where the bullet is seated), empty cases at .469, and factory loaded at .470.  At the bottom they all measure .470, even the reloaded cases. 

I am loading 200 grain LSWC’s from Missouri Bullet, who advertises on the box that they measure .452 in circumference (seems that all of their 45 auto rounds spec out to .452).  Not being a trusting soul I measured a random handful of the rounds, and they do indeed measure out to right at that size (within .001 variance of the 10 or so I measured).  Pretty close. 

Last but obviously not least is the thickness of the case walls.  I do not have the ability to measure that, at least not accurately.  But I have heard that some manufacturers make thicker case walls than others.  Makes some sense to me, but not much. 

So here is the question, the $64 one.  What is the maximum circumference of a 45 case, loaded, supposed to be, and since that seems to be the issue how do I fix it?

Ron

Dan W:
Ron, I use a case gauge when I reload 45's, so I don't recall that case measurement. I do use a Lee factory crimp die on anything that fails the case gauging test.

But I do recall that 45 ACP is a straight walled case and I think that the crimp when correctly applied to the case will measure .469-.470" at the the top.

Sounds like you need more crimp.


But back in the first post you said that even factory ammo was giving you problems. Did the spring replacement remedy that issue?

Maybe you had more than 1 problem to deal with.

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