Hello - here are some of my loads. All loads use NEI 85.308 GC sized .311", CCI 500 primers, Midway cases, and have an overall length of 1.38" The data shows powder, charge weight, and average velocity.
HS6, 7.3gr, 1228 fps
HS6, 7.6gr, 1275 fps
HS6, 8.2gr, 1349 fps
Viht N340, 5.4gr, 1102 fps
Viht N340, 6.0gr, 1246 fps
I also tried WW296 but didn't save the data. It seemed promising, but I'd never seen it mentioned in this application, and consequently never pursued it. It would be interesting to try again when it warms up outside.
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