Oops, forgot the vanes at around 10 Gr ea. so now they weigh 220 gr, I shoot 100 gr slicks, still 30 short. Now is where it gets tricky cause you need to check the FOC, Too high and the bolts nosedive, not enough and they shoot like a scatter gun. Its a lot of trial and error but when you are done, WOW. My exocet will hit a 1 inch bull at 20 yds everytime off sand bags.

Good luck, Stan