I have an older one that I bought from someone used on the forums and I love it……that one must have a bit more oph than mine as I think I’m doing neck turned Gunwerks brass for the 6.5prc at 3.6 seconds, I’ve done looked at the brass in the dark and with temalaq. Think my other bass in other calibers are in the 1.5 to 1.6 range. It ultimately depends on the quality of brass…..better quality takes a bit more because it’s usually thicker.
Here’s my fabricobled setup….need to modify for a trap door and such but it’s been working great the way it is otherwise!