I have just rebarreled my Remington 700 and decided to stay with the 8mm RM. I have been trying to develop an accurate long range load with Barnes or other copper bullets. I found a very accurate load with the Hornady GMX 150 grain, but the pressure turned out to be way too high. (loosened primer pocket). And, I didn't build a new 8mm RM to throw 150 gr. bullets. The barrel is a Douglas medium weight match 24 inches long, stainless. The GMX 150 gr. bullet produced 1/4 minute groups. Testing with any of the copper bullets is EXTEMELY expensive. I am looking for a load with 180/200 gr copper that will produce half minute or better. This barrel will do that with jacketed lead bullets with little fussing. But, copper bullets will not tighten up. I am open to all recommendations!