Hi, Here's what's involved: 180 lb crossbow, Barnnette Xtreme 20" carbon bolt with 100 grain field point 20" bolt with 100 grain Muzzy 3 Blade hunting point Here the problem: Same weight shafts were use for setting up for hunting field point and Muzzy were both supposed to be 100 grain Crossbow was zeroed in using 100 grain field point Crossbow was then tried to see effects of sacrificial 100 grain hunting point With the hunting point, all the attempts resulted in bolt grounders Why? Weighting 2 identical bolts (they were selected to have the same weight) However, why was the 100 grain Muzzy hunting point weighing much less than the field point? After all, they both have been listed as 100 grain points! Why was the lighter hunting point taking a nose dive into the dirt instead of flying higher than the field point? We tried for a while to fix the problem, but the weather severely cut into our doing this, then we had to prepare for the firearm season. The crossbow problem was abandoned at that time. But come Springtime, we will pick up the problem again. So we therefore need some answers from you, the people who have encountered such a problem before. So, to sum up: Why should the hunting 100 grain point be much lighter than the 100 grain field point? That creates a problem to be able to shoot field points and hunting point with the same crossbow settings. Should not the lighter shaft fly higher than the heavier field point? Should I use a heavier hunting point to match the weight of the field point? Thanks! Could you pls. send a copy of your reply to zonofabeeAtgmailDOTcom? I would really appreciate it.