Plenty accurate enough for deer hunting to 30/30 distance. Haven't shot that rifle in several years either. Rifle was a Marlin 336 C in 30/30 made in 71 or 72 with micro groove rifling. You should get better than 2.5 " groups. Try 150 gr bullets or 170 gr and you probably will get better accuracy.. What is the Shooting Range of a .30-30? The effective shooting range of a .30-30 Winchester rifle is generally considered to be around 150-200 yards for ethical hunting purposes, although it can reach much further distances.
We've gathered 30-30 ballistics charts from every major ammo manufacturer available. Whichever 30-30 rounds you're shooting, we have you covered.. Was searching for 170 gr accuracy and found this on 150 gr. "The 150 gr 30-30 has a maximum effective range of around 150-200 yards. When using a polymer tipped bullet and a scoped rifle, it's possible to extend that somewhat to around 250 yards or so. That's plenty of range for most hunters though. 30-30 Winchester 150-gr bullets are within an inch of aim out to 100 yards, by 150 yards.