I've been kegging for awhile now, but I still haven't managed to successfully fill bottles from my kegs without losing all pressure.
I don't have a counter pressure beer filler or a Blichmann Beer gun, and for the moment I'd rather spend my beer-money on something else.
The few times I've tried to fill a couple bottles I've done this:
- Chill the keg (well, already done)
- Chill the bottles
- Turn down the keg pressure to almost nothing, like 1-2 psi
- Raise the keg
- Insert a piece of bottle-length tubing over my cobra picnic tab
- Slowly fill
I'll leave the bottle in the fridge, then come back a couple hours later (or bring it to a friend's house, etc) and the beer has almost no carbonation. My capper seems to work fine, as my regularly bottled beers don't seem to lose any pressure.