For your #1, FYI, punching your info into QL gives me this:
47.0 - 2937 fps @ 54K pressure.
48.0 - 3003 fps @ 58K pressure
M1, thanks for the QL lookup. The load seems to be inline with QL. Thanks.
Change the battery and try again
WS, I do keep up with the batteries, been there.......always keep a new battery handy.