You are correct #26176 123 is ELD-M.
Not X as I posted.
You are spot on about POI on failures to perform not being talked about.
I have harvested many deer and got to the point of experimenting with 4 places to shoot them with different types of bullets and weapons.
Heart shots with a "pass through" type bullet has resulted in longest distances traveled for the shot deer.
Explosive 55gr V-max to the heart 40 yards was max for me.
Proper neck shots resulted in NO travel.
Double lung through the ribs with varying bullets 40-80 yards traveled.
Straight on chest shot various bullets and velocities No travel.
I have had 2 bullets i did not like 155 Palma Sierra .308" and 55 SP Hornady .224"
The Palma was tough constructed and just penciled through.
The 55 SP mushroomed nicely but no shock factor.
Deer acted like they were never hit and ran 500+ yards.
Out of all the bullets I have used I can say for me the lighter more explosive bullets kill much faster.
And observing my friend use the 55V-Max with his horrible shot placement I can say the shock or trauma factor is pretty high with these.
He has not shot any deer that needed tracked with them.
I was hesitant to use the 140 in 6.5 and went with the 129 SP Hornady last year and it worked perfectly.
That was in a 6.5x55 Swedish Mauser.
I used to be in the heavy bullet crowd but I crossed over.
I have a 'YouTube buddy' that has killed in the range of ~500 hogs with the 6.5 Creedmoor and the 129gr Hornady Interlock. It is extremely effective for him, and he has plenty of video proof. I have zero doubt that your 6.5x55 is a hammer with those too.
I've only killed ~15-18 with the .308 and 150gr Interlock...but it was quite impressive too.
It has certainly convinced me to this point (subject to change) that the Hornady Interlock is a fantastic bullet when kept above 2,200 FPS.