10 twist seems a bit slow for a 7mm barrel. With that twist you may be limited to 140 grain pills or lighter, which means you will have great velocity numbers, but if you are looking to take a long poke at something, you could be at a disadvantage.
Hornady brass has been good to me in the past, provided you don't hot-rod the rounds. In my experience I would put it equal with Winchester, just a bit higher than Remington and below Federal when comparing the big American brass manufacturers. I know some people who have had issues with primer pockets getting loose, but in most of those cases, they were running at max or very near max loads. I would suspect that had they been running Rem or Win brass the results would have been the same.
