Just a suggestion....I load both the Hornady AND regular length brass for other bullets. Depends on what I am doing and the ranges I plan to shoot. I would a suggestion, load up a LOT of the Hornady FTX, use of ALL of the short brass you have for it. Load them for hunting only, which means max load. Say what you will about the FTX, but it is VERY accurate due to the better Ballistic Coefficient than round or flat nosed bullets especially when stretching out the range. I zero mine at 225yds and at 2100fps or so it gets there quickly! I also load Bear Tooth Bullet 425gr Piledrivers and multiple other types of bullets....I have Nosler Ballistic tip 300gr, a LOT of different cast "plain base" bullets of various weights from 250gr-550gr. So enjoy trying other bullets, but I'd recommend ONE other thing! If you are trimming brass to the short Hornady brass, buy some regular Hornady brass (since you can't buy the shortened FTX brass) and trim those, and ONLY use the Hornady brass for the FTX bullets, save the starline for the other loads you may want to do! Saves you a lot of sorting!
Also, you are doing fine with the belling as was already mentioned, the trick is getting the bullet seater/crimp die into the proper position, that is why some folks like to use that die as a SEATER ONLY and purchase a Lee Factory Crimp die to do that step.
Let us know how you make out!