ORIGINAL: Pglasgow
If the contact is first made on the muzzle side of the nipple face, I think a shorter nipple will exacerbate the problem. If in on the breech side, it should help, I think. The hotshots are selling at Walmart for 2.00 and they are a little longer than the standard #11 they sell.
You are right - I had my opinion backwards. Being the hammer falls on a half-moon arch, the taller one may help.
Good catch Phil!