My only concern with designing the .35 mold around the available mag lengths is that by the time it is all said and done all we'll have is just a duplicate of the jsb 81gr. Available mag lengths is most likely the reason jsb only has one weight offering in .35 Cal. If you are going to go through the trouble to tool up for molds I think it makes more sense to offer a heavier pellet alternative to the 81 jsb. At .35 Cal and up you don't actually need mags, just single load it