The only time my groups did not improve when going to a smaller primer was with the 257 Weatherby (71.3gr MRP). In my 338 and 375 however, the accuracy improved dramatically when I went to 210 Primers in the 338 (73gr RL-19 for a 210 TTSX and 71.3 for the 250gr Nosler Partition or TSX) and in the 375, with both 300 and 270 grain loadings. this was not my original thought. A fiend of mine recommended this and he got it from a Federal ballistics guy years ago.

A good principle to guide me through life: “This is all I have come to expect, standard lackluster performance. Trust nothing, believe no one and realize it will only get worse…”