I think this one fits into the existing dovetail and it tightened down with set screws. I wouldn't imagine it being the strongest setup. At least with the setup for the 336 the end of the mount is screwed to the front of the receiver. Personally I wouldn't bother scoping a 30-30 Win unless you just have to. I know some federal reserves make you use a scope. I think a peep sight would let you shoot just about as far as the 30-30 is capable.