Bottle taste vs. Keg taste

[thorn_bird]

Hi all,

I've noticed something on my bottled beers over the years that drives me nuts and I'm ready to figure this out. I do well at competitions, and I feel all of my practices are solid, but I notice that whenever I bottle for competition, the beers taste more bitter to me than in the keg. What do you think could be causing this? Like I said, they still score well, but if I pour a bottled beer (bottled using beer gun) next to the keg beer, they are different.
Thoughts?
And thanks for the help in advance.

 

[RPh_Guy]

Sounds like oxidation.
Are you purging bottles of air with CO2 before and after filling? Capping on foam? Activating oxygen-absorbing bottle caps immediate before or after bottling?

Us bottle primers have a big advantage reducing bottle oxidation because the yeast are quite good at removing dissolved oxygen.

You could consider using sulfite if you are otherwise unable to reduce oxidation.