SASS dropped the 600 fps minimum velocity rule this year.
Maximum velocities are 1000 fps revolver and 1400 fps rifle
You might ask the folks over at
www.cascity.com and
www.gunfighter.com (click on the cowboy action shooting forum.)
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Gunslinger
We live in a time in which attitudes and deeds once respected as courageous and honorable are now scorned as being antiquated and subversive.