I have a Remington Model 721 that has been rechambered to 35 Brown-Whelen. I am looking for information regarding sizing and fireforming the brass for it. Seems to be a lot of conflicting info on the process. I have a set of CH4D dies for it. Any information would be appreciated.
There are three ways I would approach it:
1. Get some .30-06 basic (cylindrical). Size it in your FL die for a tight fit in your chamber. Fireform with a 200 gr bullet using a middle-of-the-road Whelen load.
2. Neck up 35 Whelen brass. I'd use a .375 tapered expander. Then follow the steps in (1.) above.
3. Buy some Quality Cartridge .35 B-W headstamped brass.
