Any of you intrested in a cartridge that blows the Ultra stuff into the weeds, far flatter shooting and way more energy? If you are check this out!!!

250 grain bullet, 98 grains of IMR4350 = 3253 FPS and %875 FP energy.
100 yards = +2.35" velosity = 3046 Energy 5150
200 yards = +2.44" velosity = 2851 Energy 4512
300 yards = -1.74" velosity = 2664 Energy 3991
400 yards = -10.8" velosity = 2486 Energy 3430
500 yards = -25.5" velosity = 2313 Energy 2971

Yep that is the .366 D.G.W. a direct neck down of the .416 Rigby cartridge and just about the ideal bore diameter for that case to get the best efficiancy. You should see the ballistics with the 286 and 300 grain bullets. Think of it the .366 has more energy at 300 yards then the 300 Ultra has at the muzzle. and is flatter shooting. If you compair the trajectory and balistics to the Ultra Mags big brothers, you will see they fall even further behind. In fact the only cartridge that holds up at all to the .366 is the .378 Weatherby and again the .366 is flatter shooting. Its velosity may be alittle slower but the ballistic coeficiant of the bullets makes up for this and as far as flat shooting the .366 beats the .378.