I have the Uniflow and I installed a Micrometer Adjustment on it, to replace the OEM adjustment. It seems I have the large one. Even at that, I can accurately throw literally hundreds of cases of powder in the weights you are talking - even less than 2.5g, for both my 38 and my 380.
After using that Micrometer Adjustment, I would never go back to the other one. I can literally dial in the EXACT number that I noted last time I loaded the round and nine times out of ten, I throw the charges into the scale pan and they are RIGHT-ON! Any that are not right-on are so close, they are essentially the weight I am throwing (perhaps only one or two powder granules -at most - either side of right-on)!
I do also have that inner baffle. It baffles me, because I have not really determined if it actually helps or not as the measure throws just as good with it as without it. I suppose for some really fine ball powders, where the granules are extremely tiny, the baffle may be doing it's job.
Now, I throw every charge, even for my most accurate loads. With the OEM measuring rod combination, I never would have done that, I would have thrown a bit lighter load into a pan, then trickled up.