I have the same rifle. H1000 with hornady 285 elds and peterson brass work real well.
I've tried the Peterson Brass in my Creedmoor and it works well. I see your from Texas, I grew up in north central around Wichita Falls area as a kid. Lots of ranch land to shoot on if your friends with ranchers and don't shoot their cattle. ha. Any long range areas left? I now live in southern Utah.