Thread: Hodgdon /ADI BM8208 data

Greeting again,
Having an inside morning so I graphed the two sets of data I have been working with, the Hodgdon /ADI and Data from Handloader developed by Brian Pearce. I find the graphs make it much easier to understand the difference in the data sets and where my chronographed results fit in. I worked at least part time as a draughtsman for around 50 years which may explain this. Anyway my results are very close to the Handloader data in spite of my 4 inch longer barrel and heavy cases. Hornady data is slower still likely due to a shorter barrel.
Regarding pressure an article by John Barsness I read stated that velocity was a better indicator of pressure than anything else available to a Handloader. This makes sense to me so I work up to velocities rather than powder charges. The Hodgdon /ADI data shows pretty low pressure barely over 50,000 PSI so pressure is likely held down a bit to suit the semi auto rifles. My selected load of 24.5 grains of BM8208 with the 60 grain VMax should produce the same velocity as the Hodgdon /ADI max so pressure should be similar and I will go with that for the present.
Regards Grandpamac.