the people at sierra advised not to go up to 100 grainers in their bullet in .243, as they didnt expand well on deer sized game.....
Hmm, thats interesting. You must have been talking to someone that had been smoking a little something. The 100 grain GameKing was designed as a deer bullet and expands very well. It also holds together well. I use them exclusively in my 243 Win. Are you sure you aren' t talking about the MatchKing?