I wonder if it's a shipping issue, either to the store or from the store to you.
I've been at Sportsmans Warehouse when a delivery shows up and it's just all tossed in a big box and sent to the store. I could imagine if you have a few boxes of bullets with those when they were shipped to you then they acted like expensive packing peanuts.
I had decent luck with Winchester rifle brass, but I load the first shot as short range ammo for offhand or rapid fire so that everything gets ironed out before used for accuracy.
For bad dents I use needle nose pliers...if you put the whole nose in the case mouth and open the pliers, things get closer to round for the sizing die.