Efficiency & ball size
I noticed something when I was trying out different paint today. Smaller bore paintballs are less efficient than medium & larger bore, even with the right paint//barrel match. I had to turn my reg way up to get good velocity with really small bore paint.
I was using Proball Platinum out of a .689, and easily got 295fps. I was trying out Direct Hit paint, which shot very well, but is smaller so I used my .685. I had to turn the reg all the way up, and couldn't get it higher than 290fps.
Just some food for thought for those interested in efficiency.