RE-15.5 in a fast twist 22-250 or 22-250AI

[7.62willdo]

Anyone try this with 70+ pills?

 

[supercorndogs]

Is it pretty slow? I was using 4831sc and 4000mr in mine. I would have tried h4350 if I had some.

 

[secondofangle2]

It is not dense enough and hard to fill the case with enough powder to get velocity, depending upon the application