I recommend using the 35 grain Hornady V-Max in the Hornet. Not only is this an accurate and effective bullet, but it allows you to ignore magazine limitations.
All V-Max bullets have the same shank length -- the weight differences come in having shorter noses. You can load the 35 grain bullet so the shoulder of the bullet touches the lede (origin of the rifling) and the load will still work through the magazine.
I recommend using the Lee Collet Die, and putting a couple of washers on the shell holder, to make the collet activate early, leaving the lower half of the neck unsized -- this will act as a "pilot," centering the round in the throat.
As for charge, fill the case with Li'l Gun, tap it to settle the charge a bit, then seat the bullet well out, close to the lede.