RE: 100 or 125 grain broadhead
I've always used 125's. When I first started bowhunting, the field points that everyone was shooting were 125g, so it made sense to get the same weight BH. Now that I give some thought to it, I like the better FOC % that I get with the 125's, it gives my shorter length arrows a better spine match and a bit better penetration. The FP and BH still weigh the same and fly to the same point of impact, so I've seen no reason to change - except the 125's are hard to find around here.