I'm not sure what factory ammo is loaded to, velocity wise. But the Hodgdon manual shows it slightly more than the 30-30. Handloaded in the Encore it is possible to get very close to .308 performance though. But it should do just fine as is, out to 150 yrds or so. I'm shooting the AI version in a 15" barrel, and love it. But that's a whole differnt cartridge.
Dave