Unknown1, yeah, I knew your quoted area wasn't your experience but I didn't know how to connect any better with the questioner. Now I see it was Ross. I've been into the weenie loads ever since about 1988 when I developed one for skeet. I now find they are deadly at 16 yards (several 100s) and close sporting shots.
Ross, as I said above, I've dabbled with the weenies for a long time and even spent many a day working with them with a chronograph. My findings suggested they need enough velocity to guarantee a reliable and consistent powder burn. Your 700X may work OK when just at 1150 or so but my records show that, with 700X, I needed around 16.5 grains of 700X before the velocities settled down to mostly single digit standard deviations. With Clays, I like 16.3 or more. I don't find the need in my use for 1300 fps loads we often see promoted by others.....breakemall