Are the musket caps and #11 caps interchangble on the same nipple, or do you need different size nipples?
Not even close. The musket caps are larger in every dimension. If possible, I recommend getting a replacement nipple from the maker of your rifle to avoid the problem I related earlier.
If you can find the caps, this is a pretty cheap modification, and makes your rifle a good bit more user- friendly afield. Plus, the musket caps just look cool.
