I think it's more of the min/max weight your crossbow is rated for. I shoot a Tenpoint Stealth XLT, WITH a 100 grain Wasp Jak mechanical. This is on a Luminok arrow. This set up total weight of arrow and broad head is 420 grains. I have good flight with this and it fits well into the weight profile for the bolt on the Stealth XLT.

I have tried both fixed and mechanical. I like the WASP JAK hammer for crossbow.

Good luck