i know before i start,there are those that will say the 300 mag is too much gun for whitetail.however,i have taken dozens of deer over the years with the 30-06 150 gr rem corlokt and never saw the reason to use anything else until now.i sighted my 300 mag in with the 150 gr wby sp only because it was flat and accurate.my question to you guys that shoot belted mags is what load or bullet type would work best for me shooting on a pipeline where shots range from 50-400 yards?i normally take heart shots when the opportunity is there to try to keep from ruining too much meat.any advice appreciated,especially on the 150 gr sp. btw,the only reason i have the mag is that i always wanted one and i had a chance to swap a rem 700 30-06 for the gun and i already had a wby 30-06 i bought in 1970.