My testing back in the '70s showed that as-cast bullets were more accurate than sizing them, so I got sizing dies that were about 0.001" over the nominal as-cast size. Then I start pan lubing and then tumble lubing.
So, all a Lubri-Sizer was, to me, was a way to get lube the bullet or to seat a gas check.
I would tumble lube them and forget the bullet sizing altogether.
For LLA, you want just enough so that all the bullets have a wet/shiny look after tumbling. You do not need, or want, the bullets to be yellow/amber/brown.
I like to cast 200-500 and then lay the bullets on their sides in a glass casserole dish, squirt a "Z" over them, and then shuffle/rotate the bullets around for 30-60 seconds. If all the bullets have a wet/shiny look, I am good to go.
Finally, did you slug the barrel? The groove diameter of a SAAMI .45 Auto barrel can have a groove diameter of 0.450-0.454", and you want the bullets to be at least 0.001" larger than actual groove diameter in most cases.