In the absence of fact, theory is fine.
Not theory, fact. You can easily test the two for yourself. Sorry that doesn't fit in one of your pre-conceived boxes...
Riddle me this. Why does the bullet from a CCI CB Short penetrate more than that of a .22 LR when applied to the same anatomical region on hogs?
I'm wondering where 150 Partitions are the basis for a point on "conventional" bullets?
S.D. often falls to pieces about the time the bullet falls to pieces; my money is on a 30/30's ability to dig if we're talking 150 cup and core spitzers....or the Krag.
I have found the 30-30 with 150 and 170 grain bullets gives more penetration than most would believe. I can't remember ever catching a 150 gr. Bullet from a 30-30 on deer. I generally used Speer's version.
Those are most likely flatnose or roundnosed designs; a 30-30 with a Speer spitzer within its requisite 150 yards is akin to the 270 and 308 with Partitions, perhaps even in the TSX realm for digging, assuming it opens a smidge, and evenly at that.
The material, the meplat and the shove from the rear along with the resistance from the front all muddys the SD arguments.
