I owned one shortly in the mid '60's and decided the J stood for junk or jamamatic. It would jam about 70% of the time, so I traded it for a Winchester 77 and have never wanted another. Maybe yours will be better.

Shew me thy ways, O LORD: teach me thy paths.
"there are few better cartridges on Earth than the 7 x 57mm Mauser"
"the .30 Springfield is light, accurate, penetrating, and has surprising stopping power"