I've just acquired my grandfathers Browning A-5 Light 12, 2 3/4 shotgun. According to the ID marks on the barrel, it's a Modified Cylinder. I know my grandfather ran a lot of slugs through the gun to kill a lot of deer, but I was wondering...Is this ok? While I know slugs are best run through rifled barrels, I've heard some say that IC is the best for slugs. Any ideas?