Wilkeshunter,
I have one of the first 10k made and you should be good to go….
Make a dumby round w/ 38-55 short brass and seat a 220 ~255 gr bullet shallow, approximately 0.100” from cannelure… OAL will be about 2.677” … Slide in chamber and check function. Adjust seating if needed but from my experience with the Win. 94 BB, you will know know pretty much what you are wondering…
Feel free to private message me if you need any assistance…
