[brewmasternpb]

Hey guys, I've decided that I want to purge oxygen out of my beer when I dry hop and transfer.  I don't keg, so I don't have CO2 tanks/pressure valves, etc... I was thinking about buying one of those Co2 "guns", armed with cartridges ($25 at the LHBS).  However, after talking to the LHBS guy, he suggested adding a little bit of DME (boiled in water and cooled) to the beer, effectively using all O2 and adding to my Co2 blanket.
The logic seems solid to me, any experience?

[a10t2]

Just add the hops. The nucleation sites and agitation will knock some CO2 out of solution and purge the headspace.

[brewmasternpb]

That seems a lot simpler, yet contrary to some of the stuff I've read.  However, I'm going to do that right now (Heck, I've been doing it for 10 years)...

[Kaiser]

What about dry hopping before transfer? As long as there is living yeast in the beer the oxygen will be consumed by the yeast.

Kai