Over the years I have collected a lot of MEC bushings. If I can't find one that gives the weight I want I hone+polish until I get what I want. To establish weight I run the loader as I would use it so it sees all the banging about it would normally get and I run 5-10 shell strings. Also I have found that the MEC baffle gives less variation in weights with some powders, but not all. You will just have to try it with your load and see what gives the best results. With some powders I can get maximum deviations of .2 gr, with others it can be as bad as .8 gr.
C.G.B.
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