What are all of you talking about, with the short barrel robbing him of velocity, and causing bullets to explode?..
If the short barrel diminished the velocity enough to make a difference, the bullet would have penetrated without expanding. It didn't. It
exploded, instead.
That fact supports my theory, and my experience:
Too much velocity with a poor bullet choice.
And... avoid 150 and 165 gr Remington Core-Lokts in .308 and .30-06.
They are far too fragile for the application, and tend to blow up like a varmint bullet.
TX - Use
anything, but the 150/165 Core-Lokts. Your handload sounds like it should be work well.