Ghost - I believe he meant a carbine that has a tubular magazine, not just all carbines in general.
Frog - What I do is check several different manuals to get me a starting point (not max.). Use what powders you have as a guideline. Then I'll do as SSJoe said and load up 5 rounds each powder, and also go a half a grain up and down. For example if a consencus from the manuals said 30gr. of IMR4064, I'd load 5 of each of the following 29.5, 30, 30.5, & 31 gr. Initially loaded with my preferred bullet which may be subject to change. Start shooting with the 29.5 and punch the bore with 1 wet then 2 dry, every 5 shots to give consistancy.
But even with all that it is still dependant on the individual rifle. Two rifles of the same caliber, even the same model, can shoot the same load with 2 different results. Each gun has it's own preferred load it shoots best with. So what you read may vary.
Check the manuals and here's a link. I have a 30-30 and dies, but I have never loaded for it, so I'm sorry I wasn't more help from a personal standpoint.
As a side note for anyone: H4350 and IMR4350 are 2 different powders, as are say H110 & N110, IMR4064 & XMR4064, and others. One is slower. The manuals will specify which their recipe is for. There's a burn rate chart on the link.