John,

I shot a box of 200 gr Barnes X through my Valmet 12/30-06, and it resulted in the '06 shooting somewhat higher after that. I think it hammered the center wedge a bit. I re-regulated and went back to Noslers. I think the Barnes may adversely affect the regulating wedges in the Spartan, also. If/when my Spartan 45/70 gets here, I'll try some and report.