Actually, there was a time when the 30-30 Winchester was considered to be a very suitable target round, depending on which rifle it was chambered in.
Most lever actions aren't noted for being tack drivers or target quality rifles. Of course, there are some very notable exceptions.
Good single shot rifles, like Martini/Ballard/Ruger No1 and even the NEC Handi Rifles, to name a few can be extremely accurate with loads tailored to them on an individual basis.
Others, like the Savage 340 bolt action, can be surprisingly accurate. That action is very stiff and shoots just about any cartridge chambered in it accurately.
Another bolt action that's chambered for this cartridge is a conversion, with a sweated in chamber block, the 1911 straight pull Swiss milsurp rifle. Every one of them I've owned or shot was capable of more accuracy than my eyes were.
The 30-30 can be loaded substantially hotter in most single shot and bolt action rifles, than it can be in lever action rifles.
The OP doesn't tell us which rifle he is going to load for and seems to be new to the shooting sports/reloading.
If he has a lever action, it might be ok and maybe even give decent accuracy, depending on the condition of the rifle and several other factors.