Sorry, I was going to run this for you but I realized that I don't have a recent data update that includes IMR 8208 XBR.
In order to give you the best results possible you'd also want to provide more data anyway.
Cartridge over all length?
Bullet touching/jammed into lands at C.O.A.L. (Y/N)?
Measured bullet length?
Case water capacity (measured level to case mouth)?
Barrel length (measured bolt face to crown)?
The more accurate the data you put in, the more accurate the data you get out (also known as "Garbage in = Garbage out").
“There are three things all wise men fear: the sea in storm, a night with no moon, and the anger of a gentle man.”
― Patrick Rothfuss, The Wise Man's Fear
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