My comment wasn't a historical perspective.

I also have no clue 'why'. Why is my current production German 410 bored .401? There is a chart online of max/min diameters and sure enough, German minimum is .401.

I respect your safety decision on the spread load over your dog.

Have a nice summer and good hunting next season.


"The price of good shotgunnery is constant practice" - Fred Kimble