Stan,
Great idea. If someone else needs to make one they should note the thread is likely #14-24 instead 1/4"-24. The 1/4"-24 is a couple thousandths larger than #14-24 which has long been used for the stock bolts in Stevens and similar guns. I have found several single shotguns with 1/4"-28 bolts forced into the 14 tpi thread, possibly after trying and failing to force a 1/4" -20 in. My #14-24 die came to me from an old gunsmith (since passed away) friend that taught me that fact. As you found out, a quality adjustable die sometimes be tightened enough to cut the slightly smaller thread without breaking. Lesser dies will break.
Mike
