Currently have a M3 in 25 Cal 600MM and 30 Cal 700MM. Love them both but struggle to find a practical purpose for the 30cal. Wanting to see what your favorite calibers are? Was thinking of turning the 600MM into a 25 cal pellet shooter and the 700MM into a 25 Cal slug gun. I mainly bought them to hunt but now also enjoy shooting them and plinking out at distance. Probably wouldn't hunt anything larger than rabbits and squirrels. Any feedback on calibers is welcome.