So as you know the bottom of hunting rifles stocks, do not sit on the same parallel line as your barrel. So some stock mounts how ways to level the pic rail so it will be parallel with the barrel.I’m not 100% sure what you mean... do you mean that the rail would mount crooked to your stock? The bottoms of all my rails have a radius section for good surface area mounting on rounded stocks and then a flat section on the outside for mounting on flat style stocks. If your putting the gun in a tripod you should be able to “level” it however you need to. Especially with a ball head.