I've been lucky not had a problem with any brand tens fitting my revolver nipples, correctly.
As to the 11's little big but great for the rifle.
However, I do use a straightinline capper.
I slightly pinch the cap while in the capper before putting it on the nipple, when I run out of 10's
My fingers are so big and clumsy I have to use a capper
Have fun shooting!