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Throughout history 100 yards has been the standard distance for doublerifle regulation. Borerifles was however regulated at 50yards.

It seems the old trade of english gunbiulders set their own criterias of a acceptable regulation.


In the book "Sporting fire-arms for Bush and Jungle"(1884) by Captain F.F.R Burgess states in regards to distance and express-sights the only a 100yards was to be expected for regulation. For use at longer range only one barrel could be relied on.

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RigbyM;

I am pleased that you commented and quoted the reference to 100 yards as a proper regulation distance. I have for years contended that that is the proper distance for regulation of a double rifle and have regulated the DR's that I have built to that distance for a 2 shot group (1 shot each from the right and left barrel ---cold barrels) for no more than a 1 inch distance apart group. In my opinion the grouping should be cold barrels as that duplicates hunting conditions. Cold barrels meaning ambient temperature.

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