One question #10  caps look to be the same size, what's the difference? My rod is aluminum but no jags or brush. I was using cleaning stuff for my shotguns.
size ten caps are smaller than size eleven. The nipple on most rifles take a #11. #10 caps are usually needed for revolvers but my Navy arms 12 gauge double takes #10. You can bend the skirt on a size 11 cap and it will work on a size 10 nipple but not the other way around.
