brass measure

Hi all, I am new to reloading. I have been taking my time doing a lot of reading and planning. Last weekend I did some testing of 4 different loads. All loads were identical except I used 3 different types of brass and the 4th load I tested for any differences from my case length being 1.750...

I was given some BP accessories which included what appears to be a powder measure. What puzzles me is that it is graduated in numbers 3-7 or 8-12, depending on which way the inner tube is inserted. The inner tube is sealed at one end so the entire measure will hold more, depending which way the...