Has anyone encountered the problem of the belt on magnum brass expanding slightly so as to cause friction or drag within Redding "S style" sizing dies and also in Lee Collet dies? Dealing with a 300 win mag.

What does your brass measure before and after firing?I had some work done some years ago and the chamber was way out of round so much the die was actually shaving the case quater of an inch above the belt.Called the dude and told him it was way out and he thought I was.I soon started doing my own and never had anymore problems.He had a serious problem with his setup

Belted Magnum
Collet Resizing Die http://www.larrywillis.com/

Larry is a great guy to deal with as well as a great product.

Get one of the Innovative Technologies dies and forget about oversize belted cases...works like a charm.

I use the Larry Willis die. I have several 300 WM's and I found that a resized loaded round would chamber in one and not the other (at least not easily). In addition my Blaser seems to have a tight chamber and these rounds would not chamber in it at all. The Willis die solved all my problems. In addition, the same die will resize 300WM, 7mm RM and 375 H&H Mag brass! probably the best $70 or so that I have spent in a long time. Not sure how you are supposed to do it, but I resize in a regular sizing die first, then size it in the Willis die.
Peter.

quote:

Originally posted by 243winxb:
Belted Magnum
Collet Resizing Die http://www.larrywillis.com/

I have had one for years, needed it for the very first time 3-4 weeks ago (338WM), it worked as advertized.

quote:

Originally posted by seismicshooter:
Has anyone encountered the problem of the belt on magnum brass expanding slightly so as to cause friction or drag within Redding "S style" sizing dies and also in Lee Collet dies? Dealing with a 300 win mag.

The belt is not the problem, the belt is cut adjacent to the solid part of the web! .0003"-.0005" expansion is not going to cause difficulty in your die!
What's happening is that you're probably oversizing your brass and it has expanded and thinned above the belt. This is easily fixed by neck sizing only after the first firing, this allows the brass to 'settle'. Keep neck sizing until a round is hard to chamber, this may be 3 -5 firings of the same brass
Then adjust your FL die to size the brass to give you .002" 'shoulder bump', after that only neck size again, then when the rounds begin to chamber tightly again, bump the shoulder.

Belted brass NEEDS to headspace off the shoulder, the belt is merely 'cosmetic' on modern rounds, the only rounds that require the belt for proper functioning are the original H+H rounds!
Save your money, there's absolutely no need for any 'collet die'!

Cheers.