Originally Posted by shootr68
"... I did read a while back about a wildcat cartirage in a 22-240 weatherby mag. Claimed it was the fastest cartirage bar none, pushing 5200fps plus muzzle velocity. I will have to dig the article out of my my stoage shed [full of boxes of old mags.]and post some specifics.
Not the fastest. The .22-284 has reached ~6400 fps.
Barrel life left something to be desired.
And there are probably bigger ones around. They are the toys of people with more money than brains.
And the Navy's "Crane Naval Warfare Center", has reached 25,000 fps with helium driven guns.
(They have the brains, and lots of OUR money ;) )