I have a knight mk-85 and need to get some percussion caps. I purchased #11 size but don't fit. What other size is there? Also I was told that percussion caps don't work well with pellets, you need to use loose powder.
there are three basic sizes of caps used today. 10, 11 and Musket. 10 and 11 are just a few thousands different in the size of their inside dimensions. Musket caps have a cavity almost a 1/4 inch in diameter, almost twice the internal diameter of 10 and 11. 10's are just barely smaller than 11's. (in the old days there were about a dozen common sizes and approximately 30 total sizes and the size designations varied from country to country. A Winchester No 10 may have been exactly the same as English made Joyce number 18's.)