Belted Magnum Collet Resizing Die

[jeffro]

Does anyone have this die from innovative tech? I have a bunch of once fired 300 WM brass I was wondering if this would size to spec to fit my custom chamber. Its a little tight right now. The other chamber was bigger in the web area.

 

Thanks

[L Cazador]

Does anyone have this die from innovative tech? I have a bunch of once fired 300 WM brass I was wondering if this would size to spec to fit my custom chamber. Its a little tight right now. The other chamber was bigger in the web area.

 

Thanks

Any collet type die is basically going to size only the neck. Is your chamber minimum spec or standard? The best die for a custom chamber is a full length bushing die where you can control your shoulder bump and neck diameter. You should also know what the maximum length on your chamber is, so if you don't have a blue print of the reamer used to cut the chamber, you should use a chamber length guage and measure length. You could be over length which could cause a tight close on the bolt. Probably brass just needs to be bumped.

[jeffro]

This die sizes right above the belt. Thats where i need it. I know my length. Im 1 to 2 thousands to big around the belt. I have tried a feeler gauge under the brass and it helped a bit, but cant get the last little bit sized. When i used the feeler gauge it over sized the brass 20 thousands short of my chamber.

[L Cazador]

This die sizes right above the belt. Thats where i need it. I know my length. Im 1 to 2 thousands to big around the belt. I have tried a feeler gauge under the brass and it helped a bit, but cant get the last little bit sized. When i used the feeler gauge it over sized the brass 20 thousands short of my chamber.

You're measuring head diameter at the belt and that's too large for your chamber? How did you measure this, with a micrometer I hope? Was this new brass when you started and did you fireform in your chamber? Chamber length is measured from the head to the end of the neck. Headspace is measured from the head to the shoulder datum. Then there is also head diameter and on a belted cartridge it's belt diameter. I'm confused at to how a feeler guage is going to work in figuring chamber dimensions.

[jeffro]

I used a micrometer of course. Feeler guage is a weird trick I read about but never used before in my 30yrs of reloading. The brass was fired in another chamber, just trying to save it and use it. Its once fired.

[lancetkenyon]

http://larrywillis.com/

 

If you reload a lot, just drop the C Note and own one.

[L Cazador]

I used a micrometer of course. Feeler guage is a weird trick I read about but never used before in my 30yrs of reloading. The brass was fired in another chamber, just trying to save it and use it. Its once fired.

I see what you're trying to do. Are the primer pockets loose? If they are it may not be worth the salvage. Generally when the head diameter exceeds the factory spec by more than .001", the pockets will be loose. Even a body die or full length die is only going to size the head a minute amount and a collet die may size just enough. Are you sure this brass is worth all this effort?

[jeffro]

The primers are fine. I only have about 40 out of 150 that have the issue. Must have been a hotter load. Its probably not worth the trouble, but my reloading OCD cant let this go. haha. I have to fix it and figure it out. I think Lance is right with either buy one or get ride of those cases. Thanks for all the ideas.