I've got one of these barrels 375cal. I've shoot a 10" 3 shoot group a 1330 yards. If you want more Info about the gun just let me know. I love it. Thanks to Candi at Lawton she has been great to me.
I'm shooting the Lost river 350gr soilds.
I don't know what weight the Wildcat bullet is going to be, but..
We've been shooting the 350 grain Sierra with the 11.5 twist and it works very well.
Had it out to 1800 and change with excellent results.