Duffy, I was using 150gr. Core-Loct's in 7MM RM on both bucks! On the recovered bullet (shoulder shot,) the bullet did not retain much weight, but what was left of it had not expanded much. The other, (double lung) the exit was no larger than the entrance! I am suspecting it may have just been a bad box. Maybe the lead and/or jacket may have been harder than it should have been. I've not had this problem before.
Anyway, two holes should be more than twice as good for tracking!

I like to shoot a bullet that will expand to at least twice its size and not break up within the body. I prefer the bullet to pass through as well. IMO in the time it takes for a bullet to expand, it has delivered the most energy it will have anyway and if the deer does run, I like the better blood trail. I feel that this theory is pretty accurate or it would be legal to hunt with FMJ's.

Only pass through I want is with an arrow, and maybe just a pass though of some small southern town where they know I'm a northerner.

For bowhunting I want a pass thru. For gunhunting , if I'm in a shotgun zone I dont worry about pass thrus. If I'm hunting rifle country I'll use a ballistic tip and watch them fall where they stand!

Southern girls cant stand yankees
Shotguns are for birds.
Next....

Like several other people said, a pass through does help with the blood trail. I shoot a 7mm rem mag and every shot i have taken has passed through, though they didnt go far enough to have to trail. I was considering going to nosler partitions but i think that would probably be overkill the 7mm already has so much penetration on deer that i dont need a bullet like that. You definetly want a bullet that will expand good inside so that i doesnt just zip through, passthrough is okay as long as it does some damage when its inside.

Thats o.k.! I like my women to have all their teeth!

LOL !