I actually could have used QL today. I was going to the range to shoot some rounds. Well I had some bullets that shot fine out of my pistol while at the range, but once I used them in a Steel Challenge match, come to find out they were not cycling like they should. So I decided to shorten them, which I knew was safe by the manual but wanted to double check. Luckily, someone on the forum ran the numbers for me.
I think as soon as I get paid, I'll be buying QL to have in my reloading bench. The thing I like is, say if I want to go from the OAL to another what will or how will that change the psi. Looks like it'll be a good tool to have on my bench.