Been through my list of data I have and can't find any data on using a 200 grain Hornady ELD-X and IMR 7828SSC. I've been loading 185 grain Berger VLD's over 80 Grains of 7828ssc with great one hole three shot groups at 100 yards from sand bags. The gun is a custom Remington 700 Sendero with a 26" hart barrel and radial brake.