Krag rifle stock

[Patrick Chadwick]

can find no obvious defects with the crown or muzzle with the exception of very slight cleaning rod wear that somebody who knows what their recognizing would only notice and the rifling is prominent and breaks over clean but you never know.

You can have a yard of perfect rifling from the breech to the muzzle, but it only takes a couple of tenths of a millimeter of asymmetry at the muzzle to send the shots off course. If you can see it, don't assume it's trivial. A light touch with a crowing tool to restore the best possible symmetry will be invisible after a few sessions at the range have dulled the shiny new surface, and it may well cure the off-axis grouping.

the faux school gun has mild pitting a worn crown and shoots much better with same ammo and much less effort.

The wear on the school gun may be symmetrical, and therefore have little effect.