Moeskeeter, I shoot stock Horton Aluminum bolts that they sell in bulk. They may not be the bestbolt, but they are fairly consistent in weight and I know I can get more in a hurry if I need them.

I can keep a pretty tight grouping at 20 yards even off handed, IMHO its all in how you practice and what you practice with.

Personally I like the halfmoon knocks, but others have noted that they prefer theflat. There may be a reason to shoot one or the other but I am not aware of it.

Hope this helps you, God Bless!!