I've got a few boxes of 178 BTHP blems from Midway. If I'm loading 41.9 of IMR4064 in Lapua brass for 178 AMAX, where should I start to load the 178 blems? Are these supposed to be the same as Hornady 178 BTHP?
They are not the same. They have a higher B.C. and will likely need to be seated differently to be accurate. I have been messing with them using Varget, but nothing really accurate so far.
Should be darn near the same for a load. 2.815 or so oal has worked for me with nearly any powder charge I tried....just don't be ridiculous. On my rifles they have to be stupid far out of the case to be near the lands so I go with my old faithful