Well I was finally able to get out and shoot my 300 WSM. I have been playing with the 208 gr Hornady Match BTHP and they shot well. But I was wanting to try the A-max, they have the better BC and my tikka T3 lite really likes the 178 Gr A-Max. So I loaded them behind 64 gr of RL 17. With a COAL of 2.85 (The max length that the magazine will accept.) At 100 yds I could cover three shots with a quarter. Average speed of the three shots was 2986 fps. ES 28 fps. At 300 yds I had a 2.5 inch group The only down side to thses is the recoil. I have been awaiting three months for my gunsmith to put on my muscle break. After some 15 shots I was getting alittle recoil shy. For those of you wondering about the temp sensitivity of RL 17. When we started shooting the temp was 43 degrees at 0700 according to my kestral. I left the rounds in the car to make sure they would be around air temp. Upon arrival to the range I placed the rounds in the shade. Then placed 5 rounds in my pockey on the inside of my coat. First five cold rounds shot an average speed of 2972 fps The last five shots of the day were the rounds in my pocket. there speed 2984 average. I would like to de more research with this. I will let you know if my findings.