I've never heard of the 6.5 STW; the only STWs that I was aware of were the 7mm and the .257.
With a faster twist barrel, I bet the 6.5 STW could really move those 144 grain Lapuas. I bet it could burn out your throat faster than you can say "overbore" too :wink:
As long as you kept the barrel cool this could be a spectacular cartridge, and yes, I'm sure it has more than enough power for black bear. Good eye to catch this unknown (to me at least) cartridge, we're always interested in hearing about new cartridges.
If someone cleaned well and made sure not to let the barrel heat, no firing long strings, etc...How many shots do you think it would live through? 750-1000 maybe? That wouldn't be too bad...more or less on par with the Lazzeroni screaming patriot bird of eroding death rounds. :lol:
I found this cartridge called the .257 Ferguson which is a 7mm STW necked down to a .257. It was wildcatted by a Hunting guide in Mexico. Now if the 6.5 STW would be a barrel burner, can you imagine the .257 Ferguson?