I have a Contender that is chambered for this round. Any of you familiar with it? The only problem I have is there is some neck splitting after the fire forming, both verical and horizontal. Although I would not call it a split, more of a pinch. This is new brass also. I am lubing the inside of the mouth and the outside of the case with Imperial wax. I was using a set of RCBS dies but now have a set of Reddings, that I have yet to use.

Am I doing somthing wrong here, as I have always annealed before necking up. Or when necking down I annealed after the process.
I have my dies set so that it takes a smart snap to get it to shut, kind of like a giant Herrett round so to speak.

Would the 303 British be a better parent case? I have a few that I may try.

Thanks in advance
Jeff

Are you using Krag brass now?

Yes on the Krag brass, sorry I forgot that. It is Remington also.
Jeff