Thanks, I was hoping you'd reply Gitano. You helped me out good on my 8x56R Steyr and I won't forget it, saved me a lot of time. My Marlin is a new produced "Cowboy" model so yes it's strong enough. Well if it'll do it (2000fps) that's a good thing to have in my mind, and yes I realize recoil only goes up when the speed goes up. I'm not sure of what weight goal I'd go for but I'm sure it'll be around 8-9lbs loaded. I would presume powders ranging in the fast/medium rate would work, 4320, 4350,3031 or something? I've seen some data from the past Lyman manuals so I suppose I could start there and see how it goes. Again, thanks so much for the info.