I do not trust any bushings no matter who makes them and lately I do not trust all the bushing loads in Mecs chart.
When I reload a new recipe I use the bushing stated but also back it up with a digital scale and a beam scale. I know this is not rifle shooting, but I want to reload what it states. Some powders like 800X are higher than stated. Most are under by a few grains and some are very close as stated. I always do 10 drops to get my average. I have Mec bushings from 8-40 minus the 39, plus I have made two for 10 gauge using 29.3 grs. Green Dot and 29 grs. using Unique. These are listed as 40B and 41B.
So please do not trust what it states, measure the drops yourself. If you use a Mec reloader I suggest you get the red powder baffle from Grafs. It really helps get a more even drop.
