I emailed Wild West Guns to get some ballistics for their 500 lever gun, they replied that they don't have one available yet and they will send the data when they produce the rifle which is still in production and they're closed at the time. There's another thread or 2 on the .45-70 vs .500 S&W subject here, one current and a couple a month or so old if you want to do a search for em.