Just another suggestion, but if you can get Quuckload, try tuning your load to the OBT (optimal barrel time). I've done this with 2 different rifles now and amazed with the results. Have a M38 in 6.5x55 that was always throwing a flyer. After many different attempts at trying to fix the gun (stock, crown on the barrel, etc...), I was convinced the barrel was shot out. Once I started getting better using Quickload I was able to tune the load to hit on the OBT node. The gun now shoots .4 inch groups consistently. All I do now is tune the load for temp swings larger than 20 degrees.