Could be, Alan - I don't know, sorry.

My brother used to build ML rifles with cast off as the customer desired for a good fit. Much depends on the stock design, ie: thickness of the comb - Steve Zihn will also be doing this.

My English designed 14 bore has a straight stock, no cast at all and it points like a find shotgun, sights aligning perfectly as the stock comes into the shoulder. You do not have to consciously align the sights, they already are.