When I was in the market for a powder measure a friend who shot bench rest told me to buy a Redding BR-3 unless I was going to shoot serious BR then buyt the Sinclair or the Jones.
I did and have never regretted spending about twice what a Hornaday or RCBS used.
I use the wide rifle bushing for everything and although I've not used Trail Boss has dropped all powders tried within a 1/10th of a grain with big stick powder and undetectable with finer powders. Am sure it would do the same with Trail Boss.
Secret with it or any other measure I've used is to leave the lever down when doing any other work, when ready, pull the lever up with a fairly hard bang, count to 5 and charge the case the same way.
The working the press or other movement won't pack s empty bushing like it will a full one and the slight bang helps keep constant pressure in the hopper. I also never run it low enough to expose the baffle above.