NO4 T Accuracy on another forum....link

[Steve H. in N.Y.]

The word "compensation" comes to mind but I think it only applies to SMLE's, not No.4 rifles. Something about barrel flexing and the position of the muzzle when the bullet exits can make the rifle shoot comparatively better groups at longer distance. Hopefully someone who knows about this will chime in as it could be an interesting discussion topic.

See 1929 "Textbook of Small Arms" bottom of pg. 55.