Do the trajectory verification procedure listed in G7 calculations before any drastic decisions. They have a system that works. I live where i can hunt elk and deer all year long and use the G7 system, it works. The eld also work but will come apart and will tear things up.I am currently working on 300 win mag loads for my new NEMO ar platform and have had a few setbacks. I am interested in proven loads for the 300 win mag if anyone will share.