on my 300rum, I used 200ab bullets, with very good results. of course you have to tried different bulets, and powder as retumbo, h1000, and 200ab or 210vld .
after you will burn out de barell you can rebarell to 338edge.
I did the same, and never look back.
I can shoot all day at 800-1000yards at really small targets, and never miss.
this 300smk's are the key for 338edge.