Pull the extractor out all the way and then try it...Geo
I agree with George as that sounds like a good suggestion, and I can also add... that I will try it on a gun I can never get apart
I'm really curious to hear your reasons for why you think that pulling the extractor all the way out, as Geo has suggested, would help matters when trying to remove the barrels from a 1905 G Grade Lefever?
And do you know the reason for this little problem with your D Grade?
That said I have a D grade Lefever I can never get the barrels off of. I have to let the hammers down ( OR "fire the gun") before I can get the barrels to release from the cocking hook.