There is also a non cor-lokt PSP Remington.There is very little difference in the appearance .I have some old 250 shells that show the Remington bullets on the back.It looks like the only outer difference is the location of the splines on the bullet.It shows a cross section of all but the regular PSP..
.I neck shot a good sized doe a couple days ago ,and left no exit,I didn't have much angle on my shot,so the bullet didn't exit,and when I skinned it there was no hole other than the little entrance,When I started cutting the jellied up dog food off it I found a few little copper shards,and a massive void where the necks spine once was
.I thought the whole bullet probably blew up, but I found the lead slug with a little of the upper jacket still attached in the tender loin..I think they are probably a good choice for a 243,or similar rifle if your smart about shot placement.