I have noticed with Sauders bands which have a small very caliber specific(.50) pouch there is noticably less air drag...however the drawback of this is is you are relegated to that size ammo. But then again, I guess this the price of precision. We are dealing with a launcher that has limited velocity compared to other devices, so I am inclined to cut every corner to achieve more. On the other hand, this does reduce your versatility. I just wish other caliber sized pouches were available. The design does not require a knot either, decreasing wear. The Saunder's pouches really are nice in terms of function, even though they are plastic. They will certainly outlast the rubber and would be servicable for rebuilding several times.