My .100 short is a bit different than most. My case, that I call "Little Skeeter", has 35 degree shoulders and a bit longer neck that a standard .100 short. I shoot 26 to 27grains of n133 with amazing velocity, and really good accuracy. ive tried other powders such as 4198, and both LT powders, and I always get better accuracy with 133. My case really isn't anything special and it seemingly offers very little over the standard .100 short. I just wanted to do something a little different. Fun to shoot, and I love showing my varmint hunting buddies that my little case is just as fast or faster than their 22-250's . Lee