300/221 Case Forming from 223 brass

[300whisper_newbie]

Georgel Wrote :

I'm so glad this forum is here. I'm realtively new to .300 Whisper/Fireball in some ways, but have been intrested/working on it off and on for years.

I have a set of Redding dies including the case form/trim die. The problem I've seen is that the Redding die forms the case neck too long. The overall finished length is the same length as an unformed .221 case. My suspicion is that they used this dimension to create their die. However, my experience is that a .221 case formed to .300 Whisper/Fireball actually shortens the neck due to the expansion. Can anyone confirm this? I called Redding and they gave me some story about the dimensions changing and they stood behind their existing case form die. Meaning, they weren't going to do anything about it, a little frustrating.

I'm in the middle of a move so I can't measure the actual dimensions I'm referring to at the moment. I'll be glad to post those later when I get unpacked.

Curious as to others experiences.

OBTW, those long necks won't chamber properly in my barrel.