Hi all I plan on working a load for my mark v in 300 weatherby. I would like to use the 210 berger vld I need a starting point and any other help anyone can offer the powders I have are h4831sc and imr 7828 ssc. I have WLRM primers and norma brass. Overall length will start at 3.7 which is about .02 short of what fits in the mag box. I have loaded the 7828 before with 180 tsx which worked well but would like to use the H4831 for the temp stability of that powder.