Has anyone used the Willis belted magnum collet resizing die? I was hoping to get max life from my .338 win mag brass and thought this looked like a good tool. Does anyone else make something similar?
Also does anyone have experience with the digital headspace guage as well?
http://www.larrywillis.com/index.html
old thread but hot topic. I would not recommend spending $100 for a collet die set, that full length resizes a belted mag shell. Instead, I would recommend getting a Hornady neck sizer die. I bought one NOS for $20 at a gun shop, and it resizes the neck only, and doesn't touch the shoulder or case body at all.
Think about it, when the shell if fired, the brass expands to fill the chamber by design, and acts as an O-ring and seals gas pressure. Repeated full length resizing is going to make that brass flow somewhere. With a traditional full length resizing die set, it would push the brass down to the area just above the belt, and out top making the neck grow longer, eventually requiring trimming if it got too long.
Just neck sizing, there is very little if any brass flow.
Using a collet is just moving the area where the brass flows. Instead of it flowing above the belt and expanding there, it will flow to the area just above the collect, where the 2 pieces of the die meet, will form a doughnut there eventually. The case will still grow longer like before as well.
I don't understand this emphasis on resizing the area just above the belt ? That's not what causes a belted magnum shell, not to chamber. What causes it not to chamber, is the shoulder gets work hardened, and the die can no longer push it down- the shell starts to headspace on the shoulder rather than the belt. This happens typically when brass if fired on one gun, then reloaded and chambered in another gun with a tighter chamber.
The answer isn't full length resize to the smallest spec so the reload fits any chamber- the answer is, neck size only and use that ammo in only one rifle. Someone else in this thread stated, they didn't see the need to resize above the belt- I agree with him. He obviously does a lot of reloading and shooting. Here's why:
If the shell chambered and fired, and was extracted, it's fire formed to the chamber, if it came out, it should go back in, if it's only neck sized to reload it.
What do professional bench rest shooters do ? They neck size only.