opinions on hornady gmx bullets and reloading recipe for 7 rem mag using 139 gr gmx

[Wildhog]

Purchased 2 boxes of 270 win 130 sst custom hornady ammo and the cases were sticking. Hornady replaced them with 2 boxes of superformamce 270 130 gr gmx. Ive killed a 6 pt 150lb and 2 180 plus hogs performed very well all dropped in tracks 100yd to 200yd shots. Was wondering if anyone else has tried them and what there opinions were. And if anyone has a recipe worked up for 7 rem mag 139 gmx would appreciate imfo on the powder there using. I read i n buckmaster hodsgen superformance powder is coming out in january.