When I double pellet, which I haven't done for ages now I have sorted out some behaviours that suit the gun I don't fire them out.
I have, but because the rifling is at the end of the barrel I feel fine passing a thin rod with end protection on it down the barrel and popping the pellets out backwards.
I haven't taken out a barrel seal doing it but it occurs to me that could happen?
I shoot possums and other pests out to about 50meters all the time and sometimes further with my .25 and it's just a lovely gun for me.
Balance, power, no adjusters or other distractions, plenty quiet, and so consistent it makes me into a good shooter over and over!
I have made some brilliant shots with this thing out hunting.