Fire forming with prairie dog loads

[mikebjones]

I want a Dasher fire forming load for prairie dogs. Using a 55 gr Nosler and a step on the neck to headspace. Thinking about 28.8 gr imr 4198 for 3540 fps, but that load is for 6BR and need to know the expected velocity during forming.

Mike

 

[alf]

I've fire formed several thousand Dashers with moly plated 55 grain Ballistic Tips and VV-133. Just work up a load as normal looking for good groups and well formed brass. I was in the 3600's in a 22" barrel