All the import HP's Ive pulled apart have been "match" type HP's (not expanding/hunting HP's), and in reality, they are not even a match type bullet at all, as they all had roll crimped bases, just like the FMJ bullets. I think the HP's are just a marketing thing, and really have nothing to do with anything other than that.
Ive used the Barnaul SP's and some Wolf SP's, in all my AK's and SKS's, and never once had a feeding issue of any sort. As I said earlier, the Barnaul 125 grain SP bullets are built, and look just like Sierra Game Kings, and have a fully jacketed, and "clean" base. They have been the most accurate and consistent of any the 7.62x39 rounds Ive tried over the years.
I do have a couple of cans of Wolf 154 grain SP's, that are also pretty consistent accuracy wise, even though they have the standard roll crimp bases. The couple I pulled, were all "clean", unlike a number of lots of other Wolf Ive pulled that had lead smears across the bases. I think thats where the accuracy issues come in with the Wolf, or at least thats what it seems like to me. Those lots with smears across the crimped bases were the ones with poor and/or erratic accuracy.