Thread: Sizing loaded ammo?

Here is the part where I get told off!
A while ago I full length sized a heap of 5.56 brass I got from Gunworks and proceeded to load up about 600 with hornady 55 grainers, I made the novice mistake of not trying a few and now none of them will completely chamber in my AR, I don’t have a case gauge but I’m thinking that the shoulder needs more of a bump.

Just wondering what my options are?
I’m totally not interested in pulling all the pills.
Is it possible/safe to resize loaded ammo?

Cheers

Also, does anyone have the likes of a Sheridan cut away case gauge for sale?