How is 157gr of 165gr bullet = 99% weight retention(your original comment)? This is based on your numbers and am just curious how you came up with the 99% retention, after recovering a bullet from the only biggame animal you used it on. Wet phone books, logs really mean little to me but hey if they do to you go hard!
Also I have never seen a deer with both shoulders shattered run anywhere? Furthermore if the scapula was indeed hit (the shoulder bone) with an MRX at 430yards then how did you destroy the heart? I have shot deer in the shoulders with BTat a lot closer ranges and haven'tblown upthe heart so this kind of strikes me as odd. Or do you consider the front leg of a deer the shoulder or lungs/heart all one

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My experience with deer and the BT doesn't ressemble yours. Iprefer behind the leg 1/3 up right where the heart and lungs meet or 1/4 away high lung out the opposite shoulder. With this shot placement I haven't tracked a deer further than 50 yards, in fact I only recall one deer making 100 yards with the BT. It works for me and our canadian bodied deer.
Any way thanks for your remarks. I like the TSX for elk and moose a lot, though I just can't get off of the NBT load. Shoots great and worked wonderfully...differents strokes I guess.
Good Luck