Greetings Juanvaldez,
Thanks for the confirmation on the H&A nipple thread information.
I still question H&A's reasoning to use the 1/4-32 thread for the American sales market, particular if it going to contribute to confusion and be the possible cause of a nipple blow-out.
In most cases, the average American black powder shooter is not too savy about picky details like the difference in nipple threads. The average store sales person is not much more knowledgable either.
Usually, when a rifle passes from the hands of the first owner, the manufacturer's instructional papers have been discarded or lost, and the new owner does not have this vital information.
It has always amazed me how manufacturing companies can manage to set themselves up for legal reprocussions and do it rather easily.
That is one of the really great things about this forum. Let somebody ask a question, and at least, one of the forum members is going to have the answer.
All of you gentlemen out there like Juanvaldez stand up, take a bow and enjoy the applause of appreciation for good information.
Best regards and good shooting,
John L. Hinnant