300 blk stretches less than 223.

I trim 223 every time I load 223, with a Giraud it's faster and easer to trim than measure a case.

Ditto with above, but do check your expander button for burs that may be causing too much drag inside the case neck.

Hence your older dies have the older type expander button, and although you don't want to reduce the OD  ring on the large part of the button, you can polish up the enter and exit taper on the button just before and after the ring via spin sanding with 800 wet/dry so it not dragging on the inside of the case as much.

Don't reduce the OD ring at all, but clean up the sharp edge leading to the the ring top and bottom instead.



Also, if you have not copper solvent cleaned the dies in some time (sweets copper solvent works good for this), now would be the time to do so as well.  The inside of the sizer can get copper build up, and even with lube, the copper surface will cause more drag on the case wall then the polished harden steel.

Lastly, take a good look at the inside of the sizer once cleaned, since if you have been sizing cases that have not been pre-cleaned, the  dirt/gravel marring inside the die could be causing some problems as well.