i dont have any experience with trailing trad killed deer. all my deer were hit with high velocity 3 and 4 blade, wide cutting heads, and a 1.5 2 blade head. pentatration was the last thing on my mind, bone hit or not, and all went down fast. but now that i am using a trad bow, i am looking for a head that will break the shoulder should if hit it, but these heads like the grizzly, and the new alasken ashby heads, the zwicky's, and all these other narrow 2 blade heads kinda scare me in the blood trail department. they'd be great for punching through bone, but are they really going to leave a decent blood trail, with a regular double lung hit? what about those hits through the liver, or even a liver/gut hit? will a 1" 2 blade "bone buster", really leave an decent trail to follow? i know there are hits in the same spot will squirt one day, and go bone dry the next, on occasion. there are so many variables. but on average, will a 1-1 1/8" 2 blade head put down a big deer and leave a good trail to follow, assuming the hit is a pass through,on average? thanks for any input.