Isee you figured it out, w/ tip. Your excals will have lower foc, they are 71 gr lighter in the front than the ones w/ brass inserts. I shoot slick tric ks, got lots better accuracy from them, w/ a glitch or two, lol. Which ever b-head you use, it is real important that it doesn't have any wobble when you spin it. After I made a deal to check wobble, I read on another forum how you can epoxy four marbles to a piece of 2X4 to make your own.

Supposedly, too high of an FOC will affect your longer range accuracy. I'll know more when I test these Blazers at 50 yds. They were real good at 30, so think I'll be ok at 50. The Slicks I use are 100 gr 1 1/8" diameter.
Again, Danny Miller turned me onto them. He calls them "the best b-head in the world" lol. Did you know they claim most Excals have a"sweet spot" when the brace height is between 1 1/8" and 1 1/4" from end of rail?
Seems to be true on both my Phoenix and the Emax.