Hi Larkin The 24″ barrel is abt 5 to 6 yrs old The 20″ is new Would there be much difference in the 24 and the 20 inch barrel for the distance vs accuracy Cheerz for the advice For me it depends on how much life's left in the barrel , if every thing is equal I'd stick with the Tikka barrel , over here in England Lothrt-walter are for me a budget option for a replacement barrel and if it's done on a budget I'd stick with the Tikka barrel , The distance you want to shoot will not be a problem ,