Antique firearms may be fired for testing purposes without FAC. I don't think the limits of "testing" have been established but one or two rounds from each chamber of a revloler would be defensible. regular use or competition use would require FAC, but the OP is not in the UK anyway.
True freedom includes the freedom to make mistakes or do foolish things and bear the consequences.
TANSTAAFL
A box of 10.95mm balls arrived in the post today, testing will resume in the garden over the weekend...
BTW, if any of you don't already own a Pedersoli Liegi, get one ordered. What a hoot! Apparently I'm putting too much powder in, but it was kicking more than the Glock!
God rest ye jelly mental men