20 years of neck sizing for 16 Enfields and I've not broken anything yet.
Once the cases start getting a little tight to close the bolt, I ever so slightly bump the shoulder back a little with a full length die, check the length, and trim to 2.222 if needed.
I also do the bump regardless, for ammo I load for comps to make things a little smoother.
15x 303s, 1x .223, 1x 7.62, 1x .308, 8x .22s, 1x7.5, 1x30-06, 2x.357, 1x45-110, 1x45acp, 2x32-20, 1x.50, 2x12bore, 1x 357lbr, 1x .22 lbp and some others... 42 currently :-)