Thanks guys. Looks like that size is the one that will fit.

That being said, I know the BD's don't come standard with those nipples, and instead come with the ones like posted above. However, I'd switched over to the Hot Shot ones a few years back and liked them well enough so figured I'd stick with it. Why do you say use the plain ones instead? Are they that much better? I've got an extra one of those too, but just stuck with the hot shot as it seemed to work okay.

That being said, I've got a buddy that used to use musket caps and prefers them. I've thought about switching to them as I hate #11 caps, and it seems like they fail to fire a lot more than I'd like. By fail to fire the first shot just slams the cap on so hard you can't get it off if you'd like to, and the second shot fires it. I can't figure it out. The caps are on tight, I've changed nipples, the bolt looks fine, I just can't figure it out, but I've learned I have to live with it.

I've been tempted to try musket caps to see if this fixes it, but so far I've just never tried them. Would they be a better option?