The free issue of Hodgdon Basic Reloading Manual 2005 has some great loads for both of the rounds you ask about. The same info also comes in a magazine that Hodgdon has published for about $8.00. Both are usually available at your local reloading supplies supplier.
The nice thing about these is they show the pressures of the various loads. Typically, the slower the powder the lower the pressure and the higher the velocity. There are a few exceptions.
I myself like to fill a case as full as possible. Not less than 90% and keep the pressure level in a safe range. When you start loading to maximum. The pressure can spike to very dangerous levels. I've never understood why anyone wants to make a small or mid size cartridge perform like it's bigger brother. If you need something that has bigger performance. Get a bigger gun.
I've found that H1000 in the 243 and Varget or BL-C(2) in the 358 are ideal. The pressure stays under dangerous levels and the velocity is within the maximum of the cartridge. Then again, I like those Hodgdon powders.
The first deer I shot, way back in 1958, was taken to the local meat shop and processed into steaks, roasts and some burger. Back then in that little Idaho town, when you took a deer into the butcher, you got the same deer back. Unfortunately, times have changed. The last time I took an animal to a butcher, in the mid 60's, I don't have a clue who's meat I got back, but I sure don't think it was mine. I ended up throwing the burger as it stunk the house up every time we...