ORIGINAL: Palladin8
Should I expect any type of accuracy while fire forming these rounds?
Yes. My fire-form loads often shoot as well as my AI loads.
ORIGINAL: Palladin8
I am not sure if it is because the parent case doesn't fit snug against the shoulder of the Ackley or possibly something else.
In a properly headspaced AI chamber, the parent case (no bullets) should be snug in the chamber. An AI chamber is typically .004" shorter than the parent case so that factory ammo can be safely fired. There should be some resistance when you try and close the bolt.
If your chamber is a little loose, you can overcome this by seating your bullets a little longer. Seat you bullets so they engage the rifling. This will hold the case head firmly on the bolt face during the fire-forming process. Again, there should be some resistance when you try and close the bolt on your fire-form loads.
After fire-forming, be sure to adjust your sizing die to that it properly sizes the brass for your particular chamber.