Hi all, Im building a 7mm wsm but need some advice, the specs are...montana 1999 short action, accuracy innovations laminted full alloy bedding block stock, Ken farrel 20 MOA base, swarovski 4-12X50 TDS, other bits and pieces to follow. Question, im looking at a Tru-flight (because im in NZ) ultra-match 6 flute barrel...so should it be #4 or #5 contour and what length?? 24" is good, but will 26" give any real difference?? This gun has to be carried up some pretty steep mountains after a Thar or Chamois so has to be practical. I would appreciate any advice. PS looking to shoot 168 gn Bergers - any reports on loads and bullet performance would likewise be apprecited.