RE: speer grand slam bullets
I've only tried the 180's in my .300 Wby and had no problems with accuracy. In fact, the smallest group I've ever shot was with these bullets. However, I never got around to trying them on game, yet. The ones I've still got areolder ones. I believe, but don't know for sure, that they changed the construction of these bulletssince I bought mine. I don't know the particulars, though.