Re: 190 BERGER VLD FOR 300 RUM
For even better downrange ballistics, check out the 210g VLD at 3000-3100fps. BC is .640 couple that with 20g more bullet weight and higher SD and you got yourself a winner!
You should be able to achieve 3250-3300 with the 190 quite easily. As stated, start right at or in the lands. I would try H1000, Retumbo, and RL-25 for powders, maybe even IMR-7828. Good luck with your RUM.