Bob, A little more info might help. What type i.e. Pump, auto, dbl barrel etc? How long are the chambers? How is it choked?
Ron
A 1952 Mossberg will handle all modern 2 3/4" pressures as long as it is in good shape. With no choke you aren't going to hurt anything with about any load you can find. Early steel could score the barrels because of bad wads, even then that was just an appearance issue. With no choke there is nothing to bulge at the end of the barrel. Did it have a poly choke on it at one time? I have never tried one but they are suppose to handle steel well.
Tim ' ' ' ' He Tim Its in good shape and is my squirrel gun.The gun came with screw ON chokes but I only have a full choke. Thanks Bob
I have an old Mossberg 12Ga bolt with a poly choke.
I have shot everything out of it and had no problems.
I haven't used it in over 20 years though
I had a Mossberg bolt 20 guage with a polychoke when I was a kid. Shot grouse and rabbits with it. Put the polychoke on cylinder and it threw slugs pretty good. I traded it in on a 1st year 870 express, which I couldnt shoot worth a crap. Shoulda kept the Mossberg!!!!