how about this?

[Trickymissfit]

3700+fps with an 80 grain JLK bullet that has a B/C of .510!!
gary

 

[300ECHO]

Kinky but what would you launch it with? 22short mag?

 

[Trickymissfit]

Kinky but what would you launch it with? 22short mag?

.224 Vias. Basicly a 6.5x55 with the shoulder slightly pushed back (30 degree), and necked down to .224. By pushing the shoulder back you can fire form cases out of 6.5x55 cases. This same case necked down to .243 will push a 70 grain bullet faster than a Swift can push a 50 grain bullet
gary