I just bought two boxes of Sierra 150gr. bullets that I'm going to load for my brother's rifle. I have never loaded 30-30 ammo in all my years of loading, but in these times he needs a little help.

I've got Winchester brass and primers, the Sierra bullets above and most of the usual powders that would be mentioned. I would like to not have to use my prime powders, so I am seeking loading experiences with powders such as RL7, H335, A2015 and A2520. A couple of loads were mentioned in the "Good 30-30 Loads" down in the big game rifles section, however, any good experiences with these powders would be appreciated.