Does anyone use thier belted magnum collet sizing die? Is it worth the money or a waste. I usually neck size 375 improved but after 5 reloads I was thinking it might be time to size the rest of the case. I have a neck size only die set and was thinking this die would help me out. Any words of wisdom?

I have one. It's really not for the purpose you want it. You need a full length die to get the shoulder moved back a little. You probably will never need the die you are asking about. I have it because I load for a guy that has several 270 and 300 cal wby. His guns are custom built and for some reason the area ahead of the belt is slightly oversized. What happens is a normal die will not get down to the belt. We're not sure which of his guns are the "culprit" but he goes on some very nice hunts and the last thing he needs is a jam. So instead of throwing away the hundreds and hundreds of expensive cases we run them through the die and it makes them like new again. Considering a wby case is worth about $1/ea we only had to resize 90 and the die was paid for. It is a VERY NICE piece of equipment and you can resize 50 cases in 20 minutes so it's worth the time. I'm really glad I own the die now cause it works on almost all the "belted mags" and I now know no matter where I get a case from I can get the "whole" case back to like new dimensions.

Sun,

If your chamber is anything like mine you may be getting insipiant head separations after six shots!

I just neck size mine in a 378 die and then throw them away after they feel thin in the web. You can also fireform them with a bullet seated to the lands but that just wastes bullets.

The sooner these belted cases go away the better.

I have used the die to resize all of my belted magnum brass and for this it works well. I reload for several pairs of guns and when we hunt in Africa, the load I choose is the one that will work equally well in two 375's and two 300's of H&H persuasion. I also want the loaded rounds to fit any of the appropriate calibers there and this die allows it to happen most of the time. We run all of the rounds through both 375;s and both 300's and any rounds that won't chamber in both we eliminate .The die is just another tool that may be useful to the reloader. Mine is in use all of the time.

Hey suntiet, If your chamber is anything like the chambers in all mine you may never get Insipient Casehead Separations, after even 30-50 shots! (It will require that you change your Case Reiszing method to Partial-Full Length Resizing(P-FLR) so that you have a slight "crush fit" for a Case when closing the Bolt.)

If you continue to "Neck Size", at some point you will need to "Bump-the-Shoulder-Back" as Neck Sizing folks like to say. If you create Excess Headspace when doing this, then you can create a situation where the Casehead Separations do occur.

If you are using your 375H&H in any location where Dangerous Game might be present, you might want to consider Full Length Resizing those particular Cases to eliminate the possibility of "Feed" problems. Then after the 3rd firing, let them become practice Cases and go to P-FLRing.

You can also do an Initial Fireforming of "New Cases" with a Bullet seated so it is jamed 0.010"-0.015" into the lands which is no waste of Bullets at all. It helps keep the Case from having the Insipient Casehead Separations by preventing excessive "stretch" at the Pressure Ring. And it may provide some of your most Accurate Loads.

Darn shame ALL Cases can't be Belted. The sooner someone has a Belted Cartridge, the sooner they realize what an outstanding design they really are.

Hot Core---good thinkin.