I have ran N560, H1000 and N570 with the 205's. My last load with H1000 was hot @ 86g so I would not go that far. Start at 78g and workup. Call Berger and see what the 300 PRC loads are for the powders you want and start in the middle. I used the hornady load data to fireform some breakin loads on a new build. I used 1g up off their starting loads for the 200g eld-x and 7828ssc. Got real nice shoulders on the brass. It was a good load. Not sure if Rich has any data on the 205's. You will get them running north of 3150 I would think.