I had both a 410 and 20 gauge NS at the same time and when I compared the frames it appears that the width is the same but top to bottom the .410 frame is thinner by may be 0.5" or more. Also the .410 barrels are really thick in the chamber area.
Steve

Last edited by Rockdoc; 05/01/11 01:25 PM.

Approach life like you do a yellow light - RUN IT! (Gail T.)