KansasCowboy,
My Ruger M77 is the standard sporter with the 20" barrel and is not the 'K' version. The Timney spring & sear kit helped improve accuracy, as did Lilgun and small pistol primers. Also, I use a Lee Collet Die to neck size only.
I can't place my finger on any one item which made it shoot, it's really a combination of all. While working up loads, I increased the powder charge by .2grs at a time. Small changes in a Hornet add up fast due to the tiny case.