I have a throated 300 wby that I'm running 230 berger OTMs in. As I was walking up my pressure test I began to see pressure around 81grs. Stiff bolt lift and showing ejector marks to 82.0 grs. I was coming up in .2 gr increments. I kept going with the pressure test expecting it to get worse but all of a sudden it disappeared at 82.5 grs.. I walked up to 85 grs. Of n570 ( magic fairy dust) without any more pressure issues. I now run the 230 OTMs at 3000 fps with 85.0 grs of N570. This is what my gun takes. This is in no way , shape or form a load recommendation. You need to test and work up in your specific rifle. These are my results and you should proceed with caution.