I had 2 full pass thrus on deer this year. I also had 2 spined deer. On the first spined deer, the head passed thru the spine (dropping the animal) and lodged into off shoulder blade and then broke at the aluminum threads. Onn the 2nd spined deer, the head lodged into the spine dropping the animal but the head did not bust thru spine.
I had previously reported that the bow was 40#@ at my DL. I was wrong. I recently put the bow on a scale and it scaled to 40#@28 and 37#@27. My DL is 27" so I am pulling 37. Its a '65 Howatt w/ B50.
I shot the above deer w/ 515-580 grain arrows.
Over the next few months I am going to practice form and execution to hopefully avoid more spined animals in the future. Also, I'm going up in bow weight.....not b/c I need to, butb/c I think it will be a fun challenge. I'll report back with my results.