Scale accuracy and precision, how much is needed?

[hounddawg]

You seem hurt that I mentioned a weakness of your equipment

still don't get it do you, the point is not how good the scale is or is not. It's all about the results you get with the scale at the firing line

here is a spreadsheet from a recent load development. Eight groups of five shots. Well 38 shots made it onto the chrono, two did not because of user error. Two groups had SD's less than 5. Five groups had single digit SDs. Thirty eight rounds chrono'ed with one outlier which could be chrono error, all weighed on a $20 scale.

The scales accuracy or lack thereof had little to do with these results. It takes the right combo of powder choice, load weight, primer, bullet and seating depth.Once you find the right combo you can throw the rounds on a Promethius or a RCBS Chargemaster and get the same results at the shooting bench. If scale accuracy and precision was the only thing needed for consistent velocity you could use a .0001 gram scale and a fine grained powder and get SD's of zero with any charge weight you picked every single time. But we all know that doesn't happen, even for the guys with .0001 gram scales using ball powder

 

[JohnKSa]

You are obviously talking past each other--I can't tell if it's intentional or not, but either way, this is going nowhere.