has two holes in the sides that end up being under the cap when it is put on.
That's a good design. Use it on most of my guns, but the oversize will gitcha every time!
I made the mistake of installing a new nipple before a match last saturday and found that it was much larger than others that I'd purchased
from the same maker. It's not easy to do under those circumstances but I was able to go around it twice with a file and then once with a stone while holding the threads in my fingers. Ouch!
The home solution is to put the threaded end in your hand drill or drill press in hold the file to it checking frequently for size with a cap. It comes off pretty fast. If you take it a bit to far it will still work fine but your caps might fall off in a field or hunting situation :lol:
I continue to be somewhat disturbed by your experience :shock: