I stuck my toe in the water with the same project. #0 buck in an '06, my old Springfield. Bought a bg of shot dirt cheap and had to try something crazy.
I haven't got too far with it, but so far the load looks acceptable for my intended purpose which is fairly quiet backyard varmint control and grandson plinking.
I am using a Lee dipper for 2.7 grains Bullseye in an RP case with a CCI 200 primer. Toss the shot in some 45-45-10 liquid, seat in an unsized case with thumb pressure.
Shoots into 2" at 37 yards with aperture sights, I bet it will shoot better at 25. Have a buddy fooling with the same load reporting very poor groups at 50. Makes sense it is likely a short range proposition.
Noise-wise it is reasonably quiet, no supersonic crack in the report but it is not silent either. Neighbors will know a gun went off but might not hear it if they are watching TV.
I intend to continue as soon as I get a little time, hope to hear how it works out for you. Fun to shoot and a perfect load for the frugal.