I don't know if a bigger gun will help, but that's just me
Shot placement is number one.
It would be great if you were able to include some photos,
@Rosebud
Sometimes a picture is worth 1000 words!
I hunt some property lines that I need to respect. Even though I prefer shooting ribs, if I'm close to a boundary, I'll move the shot forward still holding midway up the chest. This often results in
Dropped
Right
There condition.
When an animal goes down at the shot, I try to get on them as quickly as possible. Sometimes the shock will knock them down even if it's not a lethal hit.
More often I shoot ribs, and with Hammers, I'm accustomed to deer typically walking 100ft and falling over dead IF they are unaware of my presence.
I have noticed over the years that when deer are aware of me, they react differently to the shot than when they are not.
I have shot a number of deer with Hammers now, and the typical result is
-Deer unaware
-Poke ribs
-Deer walks 100ft and falls down dead
Last year I had to shoot a buck that was coming to chase me off. Probably an exaggeration, but it felt like a 'him or me' moment. Quartering toward me, I put a 140gr Absolute Hammer through the near side shoulder at less than 50yd - the bullet was still traveling well over 3000fps at impact.
He was fired up and ran well over 100yd!
I think 'time' plays a part as well. Even if you cut the aorta, it takes about 8sec for blood pressure to drop to zero.
How far can a deer go in 8sec?
...depends how fast it's moving!
Even though that 140gr AH was traveling over 3000fps at impact, that buck put as much distance between us as it could before BP dropped to zero.
View attachment 516255
That's with lungs completely destroyed, as evidenced by what I poured out of the chest cavity;
View attachment 516258
A high lung shot, especially farther back bleeds slower. Slower blood loss means the animal has more time to travel before blood pressure reaches zero. I learned my lesson tracking an elk for well over a mile, hit high and back with one of the early monometal bullets that doesn't fragment.
(Imagine your deer was 3-4x bigger, and your bullet didn't fragment
@Rosebud - not something I will forget!)
Anyway, that's my story. I know we are all human, and perfect placement doesn't happen all the time. I like Hammers because they seem to be the most forgiving when it comes to different target resistances, different velocities and less than perfect shot placement.
Still not a magic bullet though! Will to live is amazing sometimes!