He cannot find his data. If you could see his loading bench you could understand. He gives a new meaning to the word clutter. I called Accurate Powders and the guy I talked to said that 49grs of 5744 and a 400gr cast boolit would deliver 1750 fps in the Merkel. Max for 5744 was 66grs according to him. Hodgdon's tech told me to fill the case to the base level of a seated boolit and multiply by 30% and that would be the starting load of Trail Boss. He did not say anything about max of Trail Boss but nobody in their right mind would use that powder for max loads. After a couple of emails, Tom @ Accurate Molds designed a 510 gr mold for the 470 which would make full throttle practice loads a LOT cheaper. It's a really great looking mold (48-510N) and if the Merkel were mine, I's have one in a heartbeat. After all that, I am having a total right shoulder joint replacement on the 19th, so my 470 nitro days may be over. Maybe my 358 Norma days as well. This getting old aint for sissies, brother.