After shooting some matches for about a year now, I think making it 8 instead of 10 would be good. The pros will still go for 8/8 and well under the 40 second mark. Most times, I can go 8/8, but my time is near the 60 sec range. I have recently gotten to the ~45 second mark, but have more 7/8 runs at that time. More practice is needed! If it gets much smaller than 8, the newer shooters like myself may get discouraged, but it would also force us to more work to get better! Isn't that the point?