Cleaning out mortises with chisels.
I have used a Forstner bit to hog out 6" x 1 3/8" through mortises in the verticals (fir) of a trestle table I am building. Now I am cleaning them out wth a chisel. I think my chisels are very sharp as I hone them regularly but I am finding it difficult to clean up the ends where I must cut across the grain as opposed to the sides where the chisels shave through like a knife through hot butter. Is this to be expected or are my chisels just duller than I supposed?
I can shave away my thumbnail so it seems the chisels are harp. Maybe technique? Any links that address this problem would be appreciated.