Good that you are making progress from October last year. If you havent already done so, I would encourage you to incorporate use of powder manufacturers loading data into your research routine. The two you have noted so far are
Alliant at http://www.alliantpowder.com/reloaders/default.aspx
Hodgdon at http://data.hodgdon.com/main_menu.asp
Read the warnings carefully as you enter, as valuable information is listed there. From Alliant:
REDUCE RIFLE AND HANDGUN CHARGE WEIGHTS BY 10% TO ESTABLISH A STARTING LOAD. DO NOT EXCEED THE LOADS DISPLAYED ON THE SITE OR ALLIANT'S RELOADERS GUIDE.
Especially important in the case of your use of Bullseye in 4.7 grains = max load for listed components used in mfgr recipe (similar to your OP components). Thus starting load for mfgr listed components would be 4.23 grains. Fortunately close to your noted throws of 4.4 grains.
As to your issue with 2/50 extraction problems, we would need much more information to assist = load data.