I don't know which is hotter, but on hand I have rem lp, wlp, and cci lmp. I have life the remingtons with unique in the .44mag, and loaded 100 with h110 and wlp last night. I have not used the cci yet
I use CCI magnum primers when I reload with H110/W296. I've had no failures to ignite in any of my reloads, but I wouldn't hesitate to use any large pistol magnum primer (I have some rounds loaded with Wolf LPM primers but haven't shot them yet). I've read positive reports about Win LP primers with H110, but my manuals suggest magnum primers with H110/W296.