It,isn't justthe deployment of the blades that cause penetration issues,it's the size of the cut.I suppose a wide 2 inch cut mechanical like a hammerheadmay speed recovery with a gut shot but it will hinder recovery if you hit heavy bone.Therefore,I look at the argument abut mechanicals being better on a marginal hit a moot point.it depends on what kind of marginal hit we're talking about.Accuracy is a non-issue for me because i never have a problem getting pin point accuracy with fixed blades at over 290 fps.It's all about form and tuning.If you don't have both,you shopudn't be shooting at live game.

I've killed about 15 deer with various mechanicals without ever losing a single deer.WhatI got however,was very inconsistant results.I expect a passthrough 100% of the time and that wasn't always the case with mechanicals and i shoot over 70lbs of ke.The biggest reason Istopped using mechanicals was durability.the blades are held on the ferule at one spot,usually with a set screw and that compromises durability.Mechanicals will certainly kill deer but they aren't better.