Glad to hear you got the wad out of the bore.. As for using bore butter to protect it.. well its your rifle. Personally I would boil that bore butter out of there and put a high quality gun oil down there.

Why you ask? Are you sure you have that bore bone dry before you applied the bore butter? Was there any pitting that could have held moisture as you covered that moisture with wax. Because now you have metal, water, and wax sitting there. Granted no oxygen to make the process work. That is if the bore butter coated every part of that bore.

I just had real bad luck with bore butter. I am sure you applied it properly, and it will be fine. Next time you patch the bore butter out with some Windex on a patch you will know.. Sounds like an excellent weapon. I like old firearms.