Fire Forming Help, please

[BigDon]

I've got 2 new Sherman's to form brass for, a 25 and a 6.5. I'm planning to use the COW method. I have a bunch of Universal Clays powder I won't mind burning up. Is it fast enough? Hate to burn up precious pistol powders for this job. Starting load suggestions? (unless I'm completely off track here.) Thanks in advance for your advice.

Rifles are Terminus + Bartlein beautifully spun up by LRI. Pix to come once I get them shooting.

 

[BoomFlop]

I would suggest contacting Rich. He is always willing to answer your questions and no better person to know than the man himself.

@elkaholic

 

[Shane Lindsey]

Why not fireform and break in the barrel at the same time? (I just did a 338 Sherman, well half of it)

Form the false shoulder, buy over run bullets on the cheap, and pick a mid range load and go for it. It will help you get through the barrel "speed up".

 

[BoomFlop]

He may not need to form any false shoulders but Rich is the guy to ask.