That's why I use bullets that break bone. Knock out his front running gear and clip the bottom of his spine.
Use a high shoulder and They go nowhere.
If you dump them in the lungs they usually will run no matter what bullet you use...Mature bucks anyway.
The best compromise of penetration/expansion I have found in the 25-06 is the old tried & true 120 grain Nosler Partition.
I've shot more than alot of Russian boar the same way and get the same result. It puts them in park as well.
