they have info for 26 and 28 inch barrels on the website. You wont notice a huge velocity difference with the 24 to 28 inch barrels though. Now with smokeless, yeah you will see a couple hundred FPS difference.
My m44 mosin nagant with a 20" barrel - 2600 flat, my brothers m9130 with the 29" barrel shoots 2890 fps. Even when i had a Traditions LDR with the 30" barrel, it only picked up 75 fps more than the 24" wolf barrel.
