Update:
So, 3.1 Clays, 220gn SNS gave me 168.2pf. They were loaded long @ 1.245. No signs of any pressure spikes. My only issue is, the 220grn SNS bullets weighed anywhere from 217.2gr to 221.9, and it showed in the velocity numbers. That was from 20 test samples pulled out of the box. Very disappointed that they vary so much.
Next test is with 200gn Bayou's.