Tamid I am in the same boat looking for card and fiber loads in 12 gauge paper hulls. I shoot a bunch of black powder in my guns and really want to use a good low pressure nitro load. My guns are cylinder, light mod and mod, a few are light full and all throw very nice patterns I do not use a plastic shot cup but place a thin card over the fiber to mitigate shot embedding in the fiber filler. I have not noticed any lead build up in my guns from lead scrubbing when cleaning them after each outing. Hope someone on the forum will post some good loads to use in light loads.
