I wish we could have some time before the match for load tests but it is what it is.
The way I look at this drop tube thing. I also fall in line were I don't see a difference using any length drop tube for the end results with accuracy. I need to use a funnel anyway putting powder in the case so I use the tube that is easy to work with.
I use an electronic powder drop, Frankford Arsenal and when the pan is loaded I dump it in the funnel and it takes a 6-7 count to do it's job seeping empty.The funnel will not pass 1.5 OE, the hole is to small. I also use a 36" drop tube that fits under my Lyman 55 with the cases sitting on the floor and I have a muffin fan on the powder tube with blades cut off to get a mild vibration. I lift the handle to get the drum filled and the vibration does a fine job getting the powder settled in the 55 so when I lower the lever filling the case it's right on the button more then not. When the powder is in the case is full I lift the lever to refill the drum I go about to put a wad in the case and compress the load and start all over again
But

for loads I load for a match I weigh and use the drop tube

old habits are hard to break.
I also have used the Lyman 55 and just held the case under it and flipped the lever with out the vibrator on it and it hits the 200 yard bowling pin in fine shape.