The accuracy of Dillon loaders is impressive and many others agree to this. I loaded for years on a single stage press, and still do for somethings like my magnum calibers. However, for precision 556 and 308 loads I go to the Dillon 650 after load development on a single stage press. The accuracy does not suffer in any way from what I have seen and i still check random rounds to make sure the power drop and seating depth are staying consistent. Saves a lot of time that I can spend doing other things, like going to the range! I'll have to find the powder measure my wife got me as a present that really helps speed up and accurize the powder drop to share on here.