im sure there is already something out there on this but im curiuos to know what size roundballs to use in my 12 ga sxs. or how do i figure out what size roundball i should use im still fairly new to all this and can you use a nitro card instead of a normal shot card for your shot? ive been doubling my overshot cards up but can you use a nitro card as your overshot card or can you get over shot cards in .050 im curious to know any info would help thanks