I apologize early for making a long post here but I find that I need your help. I have been given a quantity of military powder. It is referred to as a ballpowder from River Valley Ordnance produced for 30-06 M2. It is further identified as lot number BAJ47289. This powder has been identified to me as being WC852. equivalent to H450, a powder with a similar burn rates too H4831, some lots being slower and some lots faster. I want to use this power in a 350 Remington Magnum. I am seeking to load a 240 grain LBT castbullet and a 250 grain Herter’s RNSP. I have been unable to find any listings for the use of this power for the 350 or even the 35 Whelen.
According to the Handloaders Digest the 350 Remington Magnum has a case capacity of 62 grains of water. 350 case capacity is therefore nearly identical to all of the cases derived from the 30-06 and also the 284 Winchester. I have been able to go to Hodgdon’s old 24th edition to determine load data using H450 for all of these cases. I have specifically looked at the load data of these cartridges using their heaviest bullet. Hodgdon’s charges for these ’06 based cartridges range from 50 grains to 57 grains the average of which is 54 grains. River Valley Ordnance also recommended charges for most of these cartridges. Charges range from 53.2 to 58.0, the average being 54.7.
All of this may be useless information but it is the only approach I could come up with. I am aware that I am using a heavier bullet, that the diameter of said bullet is greater, powder placement will be different in a Holland & Holland case and so will the case’s rim diameter. I would like your input on how these factors would affect loading. You men have been my go-to guys in the past so I seek your best educated approach to my problem.