Over the past 12-13 years of reloading for punching steel, progressing to 1k competition shooting. Heres what I've went thru. . RCBS 505, with a powder scoop, to get close, then trickling to final charge. Painfully slow, but pretty accurate. Next step was powder scoop unto a Lyman digital, trickle to final charge. Lyman was junk, it's still in a box out in my garage. Bought the gempro250, scooped and trickled unto it. Still slow, but way better than previous. . FINALLY saw the light, and made the investment in the chargemaster , reprogrammed to run faster, with McDonald's straw, it really sped things up, but wandered a little, and I didn't like how it " rounds off" charges towards end of drop. ( All the time, checking the cm drops on my 505. ) . Made another investment in a Uninterruptible power supply, ( $80). , No more wandering scale problems, CM still rounded charges, so I went drunk shopping one night, and ordered a sartorius 64is. . Never regretted that. Now with cm running, and then dropping unto sartorius, trickling to final, I maintain one-kernel accuracy. . Here is a sample of drops from the CM, when I was reloading 200 rounds of 50bmg. CM set at 248grains, it dropped just kernels short of true charge ( according to sartorius) . 247.935, 247.920, 247.930, 247.946, 247.947, 247.939, 247.951, 247.934, 247.931, 247.940. Now using reloader50, that means I would add 2-6 kernels, to bring final charge to 247.985-248.020. ( because I refuse to cut kernels in half) . Considering the quantity, and volume of throw, that makes the Rcbs CM a VERY accurate, automated powder thrower.