There are some aftermarket bolt manufacturers out there. Make sure to check and see if you will have to have your raceways reamed or not. 700s will vary in raceway diameter. If it is a .705 bolt then you will have to ream it which would require some specialized tooling. Also if you are not planning on rebarreling make sure you check headspace with the new bolt! Just want to make sure that you are aware of those two but Mac Bros and PTG both have aftermarket bolt offerings!