Here in Germany we live with the curious distances.
My bases are 20mm or 25mm. The gun shoots 30"...
But we play WAB with 1/72 (20mm) miniatures and 1" = 1 cm. Coming from WFB and inch it looks odd at first.
BTW: Plumbers use 2" pipes and my computer has a 3,5" HDD.
If i like the rules it is of no ...