Re: reloading with hornady brass
How dented are the case necks? If the dents are minimal, you probably don't need to resizing it especially if loading boat tailed bullets.
If you have dents on the shoulders of the brass after resizing, it means you have lubed them excessively. You need a little lube inside the mouth and just a little on the shoulder and neck of the case and a bit more lube on the body.
Also, what kind of lube are you using? If it's Hornady One Shot, then for a case of the size you speak of, I'd suggest something different like Imperial Sizing Wax.