In my experience, the only guns that have an advantage for the lever to be slightly to the right are those that are built to take up wear and slowly move to the left as wear occurs. Tamid is correct that Most English guns center the lever on day one. Parkers, Syracuse Lefevers, LC Smiths, and similar guns were made with variously designed angled lockup’s that put the lever slightly to the right, maybe 1/16” or 1/8”, no more. The only time I’ve seen a lever an inch to the right occurred when I had trash between the water table and the flats of the barrel and prevented the action closing.
