Originally Posted by
emtrescue6
Good point on seating a .264 bullet in a .257 case with a boattail, that obviously was lost on me.
You may very well be right on the fireforming of AI cases not requiring the "jaming" into the lands when forming from the parent case...this is my first AI and my smith and several friends that have them advised doing so to ensure a good fire form and reduce loss from split necks. I have yet to experiene any case loss using the "jamming" processs with heavier bullets...I have witnessed such "loss" watching others fireform...I am sure my day will come.
As always, thanks for your input RR
EMT, that's the reason you can just use factory ammo to make brass for an AI, it's also why when rechambering a standard cartridge to an AI you must set the barrel back, to set the headspace .004" shorter than the parent.
Using factory ammo to fire form you may have slightly rounded shoulders, but that don't hurt a thing, doesn't affect accuracy and they'll sharpen up nicely the first full power AI load ya shoot through them.
RR