loaded 80 rounds of 6.5-300 wby using necked down 300 wby brass i had and good old inexpensive hornady interlocks drove nails in it. Used 92 grains of surplus 860 i think i paid 45 bucks an 8lb keg for back years ago. Id hate to see what weatherby would charge for 4 boxes of that stuff but i figure i have about 50 bucks into it.. Load averaged 3492 for an average of 5 shots with only 15 fps between the higest and lowest.