I've also seen several scopes mounted with the windage on top, elevation to the left.
Sent a brand new Hatsan back to Edgars as it was 14+ftlb, it was returned to me with the chrono test printout, 10 shots 12.05 - 12.1 ftlb

was in a dealer when a chap walked in with an Enfield 303 converted to smoothbore .410 he had just imported, it had come complete with a rifled insert to shoot .22 rimfire.