Tested RL-33 in several rifles when it first came out years ago. Alliant's early load data that was available was limited BUT generally they showed data the heaviest bullets any particular caliber. My tests showed the same thing.
I shoot a cartridge similar to the 300 PRC, a 300 win mag Rogue (a variant of the AI) I ended up owning by chance. It loves RL-33 with 230 gr Bergers. Bet RL-33 would work with the 300 PRC and 230s and the new 245s as well.
I use it in a 300 RUM with 230s, 6mm-284 with 105s, 257 weatherby with 115s, and the aforementioned 300 win mag Rogue with 230s.
Alliant still only lists these four:
link: https://www.alliantpowder.com/reloaders/Powder.aspx?powderid=36
I shoot a cartridge similar to the 300 PRC, a 300 win mag Rogue (a variant of the AI) I ended up owning by chance. It loves RL-33 with 230 gr Bergers. Bet RL-33 would work with the 300 PRC and 230s and the new 245s as well.
I use it in a 300 RUM with 230s, 6mm-284 with 105s, 257 weatherby with 115s, and the aforementioned 300 win mag Rogue with 230s.
Alliant still only lists these four:
link: https://www.alliantpowder.com/reloaders/Powder.aspx?powderid=36