I'm assuming your goal here is to save money yet have an accurate and reasonably efficient .30-30 load.
I used to play around with cast bullets in the .30-30, but it really doesn't have the same potential to throw a large enough lead bullet to make cast bullets as efficient as the .38-55 and .45-70.
I found however that the Xtreme 150 gr plated flat point bullets work very well in my .30-30s.
I copied this from my .30-30 load data base and it is my favorite inexpensive .30-30 load:
.30-30 Win, Xtreme 150 plated FP, Alliant RL-7 20.0 grains, CCI 500, 2.670 OAL.
In my Uberti 1885 with Marbles standard Tang sight and Lyman 17A globe front it will produce 1 inch five shot and 1.5 inch ten shot groups at 100 yards. Average velocity is 1750 fps and the SD is 20 fps.
I've pushed them to 1,900 fps using 22.0 gr of RL-7, but at anything over 1,775 fps (which is well over the 1,500 fps maximum recommended velocity), I start to get the occasional flier 2"-4" out from the rest of the group, and the faster I push them the more fliers I get. At the 22.0 gr leave the SD also increased to 40 fps. What I suspect is happening is jacket damage to some of the bullets at the higher pressures that is causing erratic flight.
The good news here is that they are also less expensive than the Missouri Bullet Co. 135 and 165 gr bullets at $51 per 500, with the copper plating leading isn't an issue, and you don't have the smoke from cast bullet lube.
Total cost for bullet powder and primer is $0.335 per round ($6.70 per box of 20) based on $30 per pound powder, $31 per 1000 primers, and $51 per 500 bullets.
During the great powder shortage I also found that 9.0 gr of Red Dot would give me 1,425 fps, and SD of 23 fps, and good accuracy.
Typical 5 shot group at velocities over 1775 fps, illustrating the flier problem encountered at higher velocities. If you don't mind a flier now and then you can push them faster: