My late friend, Richard L., back in the 1990's won the Burns Lake 1,000 yard winter BR competition with a Ruger #1 in .300 H&H. His load was H4350, using a 168gr. Sierra Matchking. Yes, his group was an annomoly and never to be duplicated, especially with a single shot rifle - however, he won with a group of 1 5/8".

I do not know the scope used - probably a 3 to 9 Bushnel -

165's for deer specific - if premium bullets- Partition, TSX or Fusion, they do for Elk and Moose too.