
Hi Chad,
I have 2 Handi's. A .223 and a .243. I had the same problem with the .243. I found that 2 times of neck sizing was all I could get before I had to full length size. Make sure that the brass fits flush with the chamber when resized. If not, it will stick after being fired.
It will chamber OK but stretches upon firing. Also, make sure that the chamber, shoulder and throat area are clean and dry. A little bit of Gun Scrubber on a patch will do the trick. Any oil residue will turn to carbon when fired and cause sticking. Size and trim to length and you should be OK. If your action does not lock solid when you close it your cartridge is over length for the chamber and it will stick and you will have to get out the cleaning rod to pop it out. It is a pain in the proverbial ass. I hope this helps. This is what I have found. Let me know if this cures your problem.
Tony