I have the Lyman 1200 DPS 3, for pistol loads it's dead on, I reset zero about every 20 rds or so, for rifle loads, I throw in two separate charges, for instance if my charge weight is 56.0 gr of powder xyz, I'll throw two 23.0 gr charges and check zero every 10 rds or so. I had been throwing the charge about 1/2 gr light and then trickling up on a beam scale but through testing found it to be rather accurate when keeping the charge weights on the lower side. The dispenser makes my loading so much faster.