peterson 300winmag long brass

case weight 300win mag
Peterson long 247gr +- 0.6gr
norma 218.5 +- 2.0gr

measuring with hornady 420 headspace gauge
Peterson 2.273
norma 2.258

Longer length should cut down on 1st shot case stretch. Now patently waiting for new rifle to be finished so I can try it out.
 
case weight 300win mag
Peterson long 247gr +- 0.6gr
norma 218.5 +- 2.0gr

measuring with hornady 420 headspace gauge
Peterson 2.273
norma 2.258

Longer length should cut down on 1st shot case stretch. Now patently waiting for new rifle to be finished so I can try it out.
Watching this thread, please update when you get some range time with it. I'm intrigued with this design as well, seems like a solution to a problem I've had for a long time.
 
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