"what size of group"
Same as our duty weapon. Hits must be within what use to be the 8 ring on a silhouette target and up to the head. Area is the center of target roughly 4" in on each side. Shots outside that area don't count.
"and from what range(s)"
Out to 25 yds. Most rds fired at 10 and 15 yds.
Course of fire involves firing and reloading under time, strong and weak (off) hand, 2 hand, and all drawing from holster.
"where the minimums?"
50 rds fired. I can't recall the % needed. Use to be 350 minimum. I've never really worried about minimum as every year I've fired a possible on the course.
" How many practice rounds would it take to keep this up??"
Practice? I shoot the BUG year rd. I never thought of any of it as practice.