Is there a 25 UM in the works?

You'll need more horsepower than a 25um to get a 135gr bullet moving 3100+ mv from a short barrel to make it hang with a 6um, going up 20gr in bullet weight just adds more recoil. Its going to take 82-85+ gr capacity.

I just went down this road, wanted 156 Bergers going 3050+mv from a 22in barrel. I chose a 7lrm parent case necked down to 65 holding 87.5gr water capacity. This would be my choice for a hotrod short barrel 25 as well. Brass options are limited, but adg does makes the new "G" logo gunwerks brass. The old gunwerks 7lrm brass was made by Hornady and was quite trash, been shooting this case since 2011.
 
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