The biggest mistake crossbow shooters make is not cocking their crossbow consistently in the same place, and as close to centre as possible. Cocking your bow even 1/16" off centre will drastically change your crossbows point of impact. When you cock your crossbow mark the string so you have a point of reference every time.
Quick spins may be the best cross bow bolt vane around. It's hard to put much helical on bolts as they rub the channel. With the quick spins you can put a small offset on them, and still get excellent control.
Great idea guys. I had not even considered trying any of the new vane styles out on my bolts! As the gentleman mentioned above, what about the Bohning Blazers? I would be tempted to buy a pack to try on some of my bolts as I am looking to give them a whirl on my arrows as well.