How many different calibers do you reload?
The idea of publishing data for multiple powders by one manufacturer is to allow you to choose a powder that will work for most of the different calibers that you reload. Unless you are experimenting and testing your reloads, velocity for standard deviation, chamber pressures, or trying to squeeze out that extra 1/4" group reduction, you are not likely to notice any significant difference between the powders.
Buy a pound or two of one of the powders, then load up some rounds to learn the process. See how they shoot for you. When that canister is empty you can either buy that one again, or try another powder, depending upon how you the first batch.
For what it's worth, my manual list N140, N135, N133, N130, and N120 for the 30-30 and 150gr jacketed bullets.
The highest velocity, 2200 fps, is obtained from N140. As the powder numbers decrease, the grain weight of powder loaded also decreases, and so does the velocity. The max load of N120 gives 1950 fps.
This suggests that the lower number powders burn faster than the higher numbered powders and therefore reach the maximum pressure earlier. Any of these is safe to use for 30-30 in your rifle. It comes down to a question of flexibility (use among different calibers that you own), cost of the powders, and whether you want to be able to load 218 rounds from a canister of N140 or 310 rounds from a canister of N120 (at a lower velocity).
As an aside, not too long ago, folks were using many varieties of less than optimal powders because that was all that was available. They were willing to accept dirty chambers, lower velocities, etc, just to be able to have something to reload and shoot, optimum or not. With experience, and necessity, just about any powder can be made to work. (Some calibers, like 45-70 are much more flexible than others.)
Personally, I'd probably go with the N140 or N133 as they would allow me to load 170gr jacketed bullets if I chose to. V140 and V133 seem to deliver a bit better performance (slightly more) than V130 and V120, at the cost of requiring more powder for each cartridge. If the number of rounds per pound is important to you, go with the N133 or the N130.
After you have more reloading and experience shooting your reloads, you may develop a favorite powder on the basis of economics, recoil, how clean or how dirty one powder is in your rifle, brass life, etc. But these are longer term observations.
There is not any "right" answer to your question.
Good luck. Be safe.
