Greg Tannel of Gre-Tan Rifles is one of the best LR rifle builders there is, and he's based in CO.
Suggest you strongly consider a 7mm based cartridge for LR, but not the magnum. Instead, go for the 7 SHV (by Tooley) or maybe the best all-around is the .280 Imp.
Ray Meketa (sp?) won the LG score class in the 1,000y NBRSA Nationals last year using a .280 AI, and he did very well in HG too in the same caliber. George and Dee Tompkins used a 7mm variant to place very high in the HG at the same match.
Leslie Crone is an accomplished 1,000y shooter, and at one point had good results using a 7mm of some sort with the Hornady 162 AMAX.
[ 08-25-2003: Message edited by: Nate Haler ]