Do these primers show any signs of over pressure??

No looks good.looks like your firing pin hole maybe slightly over sized no big deal especially if light loads or factory ammo does same thing.looks a little cratered on sides of firing pin hole but probably just hole in bolt face for firing pin slightly large no big deal big something to watch for.not the best pic
Primers still look nice and rounded on edge should be gtg

Good deal. Not a max load either

Are the federals more accurate than the Hornady's? Looks like the FC's lay "straighter" in chamber than hornadys.

All shoot about the same. My brass is mix and match and I can’t tell a difference

Pressure looks good.
Looks like something going on with the firing pin to me.
X2 on what 3%said .

When they come out flat after firing is when you need to back off the powder

You can also feel a raised lip where the firing pin is striking the primer for cratering. If I shoot a case that is hard to chamber due to my dumbass forgetting to check the case length it causes a harder firing pin strike. looks almost the same.