Finally got to the range to give the superformance a whirl and looks like I have something to work with. Loading 162 ELDM in new 300 Saum Norma brass necked down. 5 loads starting at 62.5gn at .5gn increases to 64.5. From a 20" barrel measured with a magneto speed results were:
62.5 avg 2947 fps 0.41 moa - no pressure signs
63.0 avg 2980 fps 1.0 moa - flattening primer and ejector mark
63.5 avg 3025 fps 1.08 moa - fair booted me definitely time to stop there!
good start pretty pleased with 2950 from 20"![]()
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