Crush fit cases for accuracy?

Discussion in 'Reloading' started by elmerdeer, Apr 22, 2008.

  1. elmerdeer

    elmerdeer Well-Known Member

    Jan 21, 2007
    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.
  2. .280Rem

    .280Rem Well-Known Member

    Mar 25, 2008

    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.

  3. Forester

    Forester Well-Known Member

    Mar 23, 2008
    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.
  4. steve4102

    steve4102 Well-Known Member

    Mar 13, 2005
    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.
  5. adam

    adam Well-Known Member

    Nov 5, 2007
    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.
  6. Boss Hoss

    Boss Hoss Well-Known Member

    Nov 10, 2005

    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"..