I have a Triumph The only difference in a Bone Collector is the Cushion stock but that is a very nice difference [I have one on my Endeavor Encore]; mine likes 115 grains of Blackhorn and will shoot a minute of angle with these loads:
Gold Dot 250 GR HP & long black Harvester smooth
250 or 300grain Shock Wave & Short Black Harvester Smooth
250 gr Lehigh Short Black Harvester Smooth
50/40 200grain Lehigh blue MMP
50/40 Shock Wave Blue MMP
XTP 250 grain Long black Harvester Smooth or 24 HPH-MMP
Hornady FPB 350 grain & 90 grains Blackhorn
A Hint for people learning to use sabots:
At least 50% of the problems getting the bullet YOU want to shoot good to do it is using the right sabot because a sabot works with one bullet does NOT mean that is the best sabot for all bullets that diameter.