I agree with everything here, I think a 45-70 would only be a side match thing, not the best choice as a runner for SASS. However, I have seen a 38 henry run well at our club and it looks great doing it, but don't have the experience the others do here. I think you also have to have realistic expectations on the cost, as I am finding and mentioned earlier. Shure you can find a cowboy 336 chambered in 38-40 in pristine condition at a gun show for 450 bucks, like i did two weeks ago, .... ( slight brag here ) but that is unusual. Finding a deal on a 66 or 73 is possible but how long are you willing to wait or how much time willing to spend on going to every gun show in your area. Its kind of a balance thing for me, getting started is kind of tough so, hitting a few shows and talking to everyone until my feet are on the ground. I am fortunate that I have a good club and members help me out with loaners on match days, but you always want your own.