The experience with the Boers and 7mm brought on the P13 in .276. The 7mm is still kicking *ss and i love my 303s and 308s. Might have to put a 7mm together for the range only when i get tired of getting my *ss kicked by a certain shooter wont happen for awhile yet. Wish i could source .276 brass. I have a No1 Mk3 chambered for .276 dont know if it is Pederson or Enfield.