Powder measuring?

[alfajim]

JR-CK the volume weight of this new Goex against the volume of the old lot you have.
Load to the same volume, irregardless of the scale weight difference between volumes of powder.
Gary

This falls into the same area I think. I bought the Lee Breech challenger kit it came with the Lee perfect powder measure which I am warned to not use with BP. In reading up on that it seems to be a fair number of folks who do and with no terrible results. So following the advise I picked up an old B&M visual powder measure off ebay for a great price, It has the brass tube hopper looks little used but no drop tube. I will get one from the Belden and Mull site thought I would get the magnum vernier one as it holds enough volume. No insructions though so any out there have a copy they can copy and send me in a email? can't find them anywhere. Need to know how to use it and differences with BP.
How do you do the cross over from weight to volume?

Jim