I have a 15" .308 Win. I found load data for a .308 pistol on Hodgdon's site. I ended up getting my best accuracy with IMR4064 (not from Hodgdon, it's a low-end rifle load from IMR's data) and either Hornady SSTs or Nosler BSTs, both in 150 grain. I shot two feral goats with the SSTs and was not impressed with their performance. Other guys here have had really great luck with them though. I don't have any experience with the BSTs on game or with the .270 in a handgun.
Good luck with your search.