like putting a 45LC in a 410. it will work,but alot of bad things can happen.The 410 is not designed for that kind of pressure.barrel could split or worse you could get parts of the chamber in your face. Be very carefull if your gonna do stuff like that. Best thing is DONT do it
That reminded me of this video. Lost Arts Part 5: The Little .410 Shotgun that Could - YouTube
Also, a 308 rifle can fire 7.62x51 but a 7.62x51 rifle cannot fire 308 due to 308 having a higher chamber pressure.