For those shooting 38-55 with heavy bullets, what is your recommended BP. I have some Goex 2F and some KIK 1.5. Only going to be shooting to 300 yards so probably don't need extra velocity but I have read that some use 3F in the 38-55. Just want to start where people have had success if possible. I am new to this BPCR stuff, years of shooting and reloading the modern stuff and now a whole different thing to learn. Thanks in advance for your replies.