Thanks guys.
David, thanks for the link, but I was asking this question specifically with the 17L 1-pin old frame in mind. The long barrel will make major easier than a G17, but I wondered if the one pin would hold up.
Eric, thanks I don't have a 17L yet, but I can get a couple of great deals here. I was thinking of just mounting a Docter and just have some fun in Open. I figured since there is some factory ammo out there that makes 145+ in a regular G17, making major in a 17L could be done.
Rob, thanks! That is very useful info!