Ordered Reddng's .45 ACP and .40 S&W latest greatest dies. They came in last night. I tried the 40 first. It's a good lookin' die. Has two carbide rings about half an inch apart. It sizes the base of the 40 case to .424" and the top third to .418". In contrast, my RCBS 40/10mm die sizes 80% of the case to .419" and the remainder stays at .424".
The case, in effect, is now bottlenecked. I guess the benefit is you get .001" more neck tension and less stress to the case head.
Interestingly, Redding's GRX push-through die sizes the whole case to .424". So this die is a combination of a GRX and a Lee "U" die.
Just another toy. It's pretty cool. Turns the .40 S&W into a mini-.400 Corbon
The case, in effect, is now bottlenecked. I guess the benefit is you get .001" more neck tension and less stress to the case head.
Interestingly, Redding's GRX push-through die sizes the whole case to .424". So this die is a combination of a GRX and a Lee "U" die.
Just another toy. It's pretty cool. Turns the .40 S&W into a mini-.400 Corbon


Bob B. 
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