I am interested in developing/testing 7m-08 loads for Honaday 139 gr GMX bullets. My understanding is the guilded metal bullets are relatively longer for weight than their lead alloy counterparts. I assume I should be using the same COAL for the finished GMX round as for lead alloy which will reduce space for powder capacity. Any suggestions for powders/loads to yield mid-range velocities in the 2600-2700 area would be appreciated. Any other techniquesuggestions for GMX or Nosler e-tip would be helpful too.