There was a guy on youtube that was loading 165 gr boat tail sptitzers in his 30-30 for longer distance shooting. I dont recall his name, and he used two different names on youtube. Searching long range 30-30 shooting may turn it up.
I doubt you would be able to get the cartridges short enough to cycle with a long pointy bullet, magazine detonations aside. Single loading is about all youre likely to be able to do. I may be mistaken about that, but if single loading anyway, theres no good reason to try to make them short and use up powder space, so long as the bullet doesnt crowd the rifling in the throat.
It would be fine for longer range shooting, but the Bergers may be a bit more cost/precision than you can really tell an improvement over a hunting grade spitzer bullet in most guns chambered in 30-30.
Despite many feeling the 30-30 suddenly hits a magical wall at some diatance and simply drops to the ground, they are used for distance shooting some. I've shot out to 600 yards, I've heard of others shooting out to about 1000 with cast bullets. Not match grade accuracy, more for fun, or shooting against guys with similar guns and load types.