There are IPSC and IDPA shooters on this forum that have put tens upon tens of thousands of production weight loads through their Shadows - loads that in a lot of cases don't even make some manuals minimum load....I think you will be fine engaging some of the shooters on here for their pet loads...ymmv.
My load with tight group is 3.4 gr. Loaded with a 147 gr. Montana gold tmj, federal sm pistol primer, mixed brass, and an OAL of 1.110"
Another is VV N320 at 3.5 gr., 147 FMJ, federal sm. Pistol primer, mixed brass, and an OAL of 1.110"
Obviously you will want to run all of these over a chrony to see if they work for you.