I also got a chance to shoot the new S&W-M&P model. I'm not a big S&W fan, but I really like this gun! Very accurate and you can customize it to fit your hand. I think S&W hit a home run with this gun and might give Glock some competition.
I own one and I love it. Accurate, reliable and easy to disassemble for cleaning. It is so smooth to shoot. Fits me so much better than the Glock.-
What does "gauge" mean anyway? As used here gauge means the number of round lead balls the same diameter as the inside of the barrel (aka the bore) that it would take to weigh one pound. It takes 12 lead balls the same diameter as a 12 gauge barrel to weigh a pound. The smaller 20 gauge would require 20 balls of that barrel diameter. The larger bore 12 gauge would require 12 lead balls of the bore diameter to weigh one pound.
In general the number of pellets in a shotgun shell...