I have a Winchester 94 30-30 with a 24" barrel. I bought it new 2 years ago and no work has been done to it. It has a Leupold scope on it.
All of these figures are from a rest at 100 yards.
For 3-shot groups, factory power point 150's give about 1.5" groups which is the best I have seen between Hornady, Remington, Federal, and Winchester factory ammo.
For reloads, I can get 0.8" groups to 1.5" groups depending on what I want. The 0.8" is slower than regular factory by about 100 fps. The 1.5" is faster than factory by about 150 fps.
I have not gone through all my planned loads, but you get the idea on accuracy.
I find two things that effect accuracy dramatically regardless of the load with this gun. First, the initial shot on a cold barrel will be 2" higher than shot from a warm barrel. Depending on the temps, the load, and the rate at which I shoot, it may take 3 to 5 shots to "settle in". If you account for this walk, your groups can stay small. The other item is the rate of fire. If I shoot, say 3 shots in rapid succession, I will start getting flyers on the 4th and 5th shots. If I go about 30 seconds between shots, I get good groups. Lastly, this gun likes a slightly dirty barrel. If I shoot after just cleaning it, I need to give the gun about 2, 3 shots to dirty it up enough. That said, after this, I can go 200 or so rounds without issues.
Practically, the way I would use the gun to make a hunting shot would be to use 5 or so shots to sight it in the day before. Once I was looking to make a shot, I would aim 2 inches low for the first shot and dead on for the following shots. If it was hot outside, I would give myself about a 6-inch target off hand at 100 yards and about double this at 200 yards. This is assuming I would take multiple follow-ups. I could give about 8 inches at 200 if I felt like I could do it with 2, 3 shots because I doubt I would see a flyer.
If I had a rest, I would go smaller, around 6 inches at 200 yards. If I was amped up I would not take the shot outside of 100 yards.
There you go, this is what I expect from my lever gun.
For comparison, I would give about the same target sizes with my 30-06 even though it is more accurate and not as prone to flyers or walks. At longer ranges and off hand there are far more variables that don't go away with the gun. Honestly, what the 30-06 buys me is less chance of follow-up as well as 300 yard shots.