Trying to find a load for my 300 WinMag. It is a custom gun, Krieger Barrel, blueprinted action etc. I am shooting berger 230 hybrids. Shooting off of biPod and tab rear bag. I sometimes get some horizontal stringing when testing my loads.Which I think is me.Other times when testing, the groups form perfect triangle’s which I assume means I did everything right. But I need to adjust the load. Any suggestions.