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Case Trimming

 
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  #8  
Old 03-17-2006, 06:20 PM
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Location: Black Hills,South Dakota
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Re: Case Trimming

The Wilson uses cylidrical shell holders that are machined in the ID to the shape of the case your trimming.On average,about six bucks a pop.This is the trimmer I use also,I just feel it lines up the shell squarer than others Ive used.
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  #9  
Old 03-17-2006, 08:15 PM
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Re: Case Trimming

Welcome aboard

The wilson is most probably the #1 as far as quality goes. As you can see both wilson and forester type units have their place.

With the addition of an inside neck reamer it makes wilson pretty much complete for most of the kinds of stuff you'll "need" to do.

If you want to outside neck turn I'd recommend a hand neck turner.

That's a 338 Win case in the wilson and a 270 and 17 Rem neck reamer standing behind the trimmer.

It is easy to see how the case length is set.

BTW, the red price tag on the 270 inside neck reamer's box says $6.95. Purchased in 1966. Its an investment [img]/ubbthreads/images/graemlins/grin.gif[/img] [img]/ubbthreads/images/graemlins/grin.gif[/img]
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  #10  
Old 03-17-2006, 10:26 PM
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Re: Case Trimming

Delta Hunter,
I too use the Wilson trimmer.What is the "secret" of getting a consistant press of the brass into the Wilson case holder so that the thing trims at a consistant length?
Jim [img]/ubbthreads/images/graemlins/confused.gif[/img]
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  #11  
Old 03-17-2006, 10:44 PM
 
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Re: Case Trimming

I have used the Lee tool for 20ish years with no problems. I use a little cordless driver and trim the cases. Than debur the inside and outside of the neck and than polish the cut with some steelwool. My driver as a nice forward reverse rocker switch which makes it easy to tighten/loosen the case in the holder. I think its quite quick. No problem with the case not cut square and you cant remove to much.
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  #12  
Old 03-23-2006, 03:43 AM
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Re: Case Trimming

One more vote for Wilson.

I even use one to trim my revolver cases for perfect crimp.

The Wilson holds the case by a press fit (in rifle anyway) in a sort of pseudo "chamber". That as I see it is simply to get the alignment to the stop (which butts up against the case head) and the cutter (which is up against the mouth) correct and makes sure that the case head and mouth are square to the stop and cutter.

Once you get the feel right it's pretty quick. I have a power attachment and use an electric screwdriver.

It's priced well too in my opinion.

I trim after sizing and decapping.

Wim
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  #13  
Old 03-23-2006, 09:08 AM
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Re: Case Trimming

Any trimmer that makes a square mouth will do just fine. Depending on ones abilities, one make/model may be easier to use than another. I like the Wilson for slow work but the Forster on a drill press bed is great.

I think the case length should be no longer than what's ten thousandths of an inch shorter than chamber length. A good caliper will measure them and compare the readings with data from a decent loading manual for maximum length. And I've seen no difference in accuracy if there's several thousandths of an inch difference in a batch of cases.

After trimming, I chamfer the mouth with an Eazy-Out screw remover turned clockwise; makes a better angle and virtually no burrs or sharp corners which means bullets won't have jacket material scraped off when they're seated. Conventional deburring tools do well on the outside of the mouth. Finally, I run the case mouths over a bore brush spinning in a drill press to clean up all the inside edges and surfaces.
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  #14  
Old 03-23-2006, 10:34 AM
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Re: Case Trimming

Sinclair makes a chamber length guage for specific calibers. It costs $5.95 each. Part number G-308 is the 30 cal at www.sinclairintl.com

The use of this tool is to put the guage in a fired case and insert into the chamber. If you leave the plug extra long it will seat back into the case at the exact length of your chamber and not what some book says.

It is not uncommon to see as much as .030-.050 difference in actual chambers vs the book. That longer area will catch carbon and be very difficult to get out. This will be the start of the dreaded carbon ring.

If you are trying for extreme accuracy, you want to case length to be as close to the throat as possible. Therefore an adjustable case trimmer is necessary, which leaves out the Lee's

The forester and wilson are the top two IMO. I have used the Forester for over 30 years but am looking for a good used wilson with micrometer on Ebay.

BH
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