10X or Benchmark are a good place to start regarding powers. I prefer Fed Gold Medal primers but don't believe they are much of a factor in an accurate load. The most critical factor regarding brass is to use all the same manufacturer and the next is sort by weight. If someone wanted to know what brand of new brass to buy, my answer would be Lapua.
Someone giving another a load that shoots lights out in both rifles is about as much luck as just picking one out of a manual and having it shoot right off the bat.
