Ok... think for a second.... I mean 30-30 Win soft point expands fine on a deer, I've dug several plumped up expanded 'ol Win Powerpoints out some whitetail azz, it's ballisticlly pretty close to a x39, bullet weight aside, but yet a x39 SP or HP won't expand in jelly.
A .30-30 Win PowerPoint uses a soft copper jacket and soft lead, now whats the composition of that x39 jacket and or lead...copper coated/washed steel, some kind of crappy hardened copper alloy, hardened copper won't flex like soft copper, Those SP and HP bullets are FMJ with it's tip chopped off exposing some kind of hard lead alloy, and being called a soft point/hollow point to get around the FMJ hunting regs? Also, is the Commie bullet jacket designed to support expansion, like modern American hunting bullets with notched, partitioned and contoured jackets.
Stripper clips don't know or care what the bullet is, long as it slides down into the mag when pressed and feeds when the action cycles, use it.
I'm sure in a SHTF situation, kinda like a deer, whatever ain't gonna know the difference if it were a FMJ, SP or HP coming out the end of the barrel, whatever knows it's gonna hurt and make a hole. The big question to ask... is will your weapon of choice feed whatever you feed it without failure, feed flawless, feed consistent with no jams, F-T-F or F-T-E, that is something to find out well before the turds are a flying
Just my .00000002 cents worth..