Me too - beer, that is.

Doubt more than 4 or 5 - but depends a lot on the loads used and amount of sizing.

Brass fired will fit better after being fireformed, as it should actually shrink .001" under chamber size, which is normal.

I do think I'd have it opened up to proper size though. A split rod and emery will do the actual work, with some skill in it's use. I've done this on a couple .17AckBee chambers that were cut undersize with perfect results.