I think 3031 may be too slow for top velocity. Mr. Richard Mann sent his results to me after he did an article on the CZ527, which showed Rx 7 to be the best out of all he tried.


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"