I just bought my first pound of RL7. I am using 300gr , 405gr. Cast and 405 Rem JSPs in my 45-70 guide gun. I know most of you like this powder with the 350gr. Hornadys for hunting . Is RL7 a good choice for the weights I mentioned? I have used Varget and IMR 4198 in the past and thought I should try RL7 since I have no 45-70 podwer. Any favorite loads appreciated.