My 6 XC, with 30" barrel:

39g of R#17
105 A max
3170 fps
tiny, tiny groups, sub 1/4"

X Caliber never copper fouls, even at this speed!

A 6 Dasher or 6 BRX are wicked when it comes to groups, 105's at 2950-3000 Max.

Last edited by keith; 07/22/16.