
I want to play with the 410 brass shells that are available.  I bought a box of 25, they look good.
BUT 

 they will NOT chamber.  The "base" of the shell is a little to big.  I think if I were to drive the shell into the chamber it would size down  but I don't want to do this  I may never get them out again..
I don't want to by a complete reloading outfit for the 410  as I just want see what I can do with this fun gun.
I have not been able to find a Lee loader for the 410, the hand held kit that used a hammer and a powder measure,     maybe they were never made.
Is there a inexpensive way to just resize the brass shell so I can fire them in the chambers and fire form them.
I want to play with .40 caliber lead balls  and and slugs  and maybe .430 soft bullets.
Any help would be much appreciated.
MT York O'Rourke