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Crush fit cases for accuracy?

 
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Old 04-22-2008, 05:02 PM
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Crush fit cases for accuracy?

If my cases have a crush, bit a bit more than slight crush fit, will this create better acurracy or worse? And will ther be any other kind of problems such as pressure? The reason I am asking is because I used a belted magnum collet resizer die and some of my cases are hard to chamber due to a crush fit.
Thanks
Elmer
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Old 04-22-2008, 05:59 PM
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Quote:
Originally Posted by elmerdeer View Post
If my cases have a crush, bit a bit more than slight crush fit, will this create better acurracy or worse? And will ther be any other kind of problems such as pressure? The reason I am asking is because I used a belted magnum collet resizer die and some of my cases are hard to chamber due to a crush fit.
Thanks
Elmer

I used to be a fan of Partial Full Legnth Resizing. It got to where my bolt was very hard to close. It was much easier to open than to close in fact, even with warm loads. In my opinion, it creates more problems than the accuracy you might gain is worth. I would have never been able to chamber a second shot in a reasonable amount of time. Unless you're shooting 1000 yard or BR competition, FL resize and go. In my experience the runout and concentricity of your brass/chamber will account for more accuracy.
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Old 04-22-2008, 06:39 PM
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Quote:
Originally Posted by .280Rem View Post
I used to be a fan of Partial Full Legnth Resizing. It got to where my bolt was very hard to close. It was much easier to open than to close in fact, even with warm loads. In my opinion, it creates more problems than the accuracy you might gain is worth. I would have never been able to chamber a second shot in a reasonable amount of time. Unless you're shooting 1000 yard or BR competition, FL resize and go. In my experience the runout and concentricity of your brass/chamber will account for more accuracy.
I think you should follow what your rifle and the holes in the targets tell you.

I also think there are very few rifles who will not gain accuracy to a significant degree by neck sizing only, if you need to bump the shoulder from time to time fine, but I would not FL size every time if for no other reason that decreasing brass life.
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Old 04-23-2008, 05:40 PM
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If by collet die you mean the Willis collet die then you need to read this from his web page. You must use this die after you have FL or nrck sized using a conventional die.

Our unique Belted Magnum Collet Resizing Die solves this problem and has several other great features. The top of this die is a case width gauge that shows when a little "extra" case resizing is required. This resizing die is used to eliminate the case bulge at the expansion ring, after using your full length (or) neck sizing die. Our collet die insures that your belted magnum ammo will always chamber properly and your cases are now able to last for up to 20 firings, even when using hot loads. Our resizing die uses a collet that fits over the cartridge case, until it bottoms against the belt. The case is then pressed into the sizing die. The collet allows your case to go farther into the die where it only reduces the area "just above" the belt.
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Old 04-24-2008, 07:43 AM
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I have never used that method, so i cannot speak from experience, but I would think that if you work hard to get low rounout on the round as many people do, you would then be undoing that work by moving the metal around when you "crush" the case. your miliage may vary, so try it and find out. Let us know what you find.
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Old 05-09-2008, 09:12 PM
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Quote:
Originally Posted by .280Rem View Post
I used to be a fan of Partial Full Legnth Resizing. It got to where my bolt was very hard to close. It was much easier to open than to close in fact, even with warm loads. In my opinion, it creates more problems than the accuracy you might gain is worth. I would have never been able to chamber a second shot in a reasonable amount of time. Unless you're shooting 1000 yard or BR competition, FL resize and go. In my experience the runout and concentricity of your brass/chamber will account for more accuracy.

Almost everyone I know who competes with me at 1K and even the point blank shooters I know including a HOF member FL size every single time.

From what the poster states he may be having lubrication issues as well -- this will cause this problems in chambering aka the "crush fit"..
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