I like the Trailboss for milsurp rounds because it can't be double charged, and a full case still isn't an overload. I have used Unique, Green Dot, and similar powders, but for them I use a pencil to check powder levels, because it's hard to visually check powder levels so low in a bottleneck case. I've never used it for 45/70 or similar, as what I have read is it's pretty high pressure, but for a low velocity.