I was out shooting a pair of 1851 Navy revolvers this week. I like to draw these guns using what some people call the cavalry draw, and others call the twist draw.
I stopped using this draw during CAS matches over 15 years ago because ROs were so twitchy about it. But if done right it is safe. people think you sweep yourself during the draw, but, actually, it would be hard to do that without hitting yourself with the gun barrel.
I put together a short video that demonstrated the draw so you can see what I mean. Here are some stills of the draw as well: