...and now THIS

[Bongo Boy]

How accurate is your calibration weight? Is it traceable to NIST?

Let's don't be silly. It may be traceable to Changping, but not NIST.

I'm totally okay with several milligrams plus or minus--a half grain isn't so good.

[Bongo Boy]

Just as an update, I finally pulled the loads I had marked as 11.4gr and 11.2gr Longshot under the 135 gr XTPs. The concern was that these were potentially 0.6gr heavier than I'd marked them due to lack of scale calibration.

The 11.4gr loads weighed in at 9.4 each, dead nuts. The 11.2 gr loads, actually weighed in at 9.2 gr, dead nuts. So, my scale was apparently calibrated well--my ink pen wasn't. Jeeeez---what a dope.