(ahem!)

Let me let you in on a little secret.
"IF" you're reloading for a Ruger No.1, full length size all your brass.
Neck size twice and the case will no longer chamber.
"IF" you're reloading for "Handi-Rifle", same thing.
Si Gle shot rifles have notoriously tight chambers.

I also use "SB" dies for my AR calibers.