I am going to use a model 29-10 with the 4 inch barrel, I would use the 6 1/2 but IDPA thinks nobody carries them!!! Most think I am weird, but I like a challenge. I have heard of guys winning with them though, so I figure I will try until I do. Mind you, I have not yet shot a match with it, so don't take this as gospel, I just have my mind made up to do it and that is what I am going to do!! My advice is use something that will really take some time to master, so it will be more fun and challenging for ya!!! Don't listen to people who don't support your decision, they don't have to get it, everyone thinks different and all think they are right, and they are for themselves but not for you, you are right and don't forget it!!!!!!!