I use a 270W. It likes SMK at 135grn with 59.9grns of H1000 at about 2900ft/sec; which is very accurate for my setup (1/2" MOA). A good backup powder for it is H4831 at 56.0grns; almost as accurate. The MOA is correct, I spend a lot of time and money developing loads specific to my rifles; most of which are hunting style rifles. Again, this is what I use, and perhaps this will help you get in the right direction.
On a side note... The best powders I have personally had success with in bolt guns are Hodgdon brand. My favorites are H1000, H4831 and Varget. I do like other powders such as RL-15, but I use this in my precision AR platform. I will lean towards a brand if I get consistent results. However, when it comes to accuracy, you have to go with what the Scientific Method provides; evidence! Brand loyalty is no better than a religion. Let the brands out there earn loyalty through evidence. Good luck, be safe, and have fun.
On a side note... The best powders I have personally had success with in bolt guns are Hodgdon brand. My favorites are H1000, H4831 and Varget. I do like other powders such as RL-15, but I use this in my precision AR platform. I will lean towards a brand if I get consistent results. However, when it comes to accuracy, you have to go with what the Scientific Method provides; evidence! Brand loyalty is no better than a religion. Let the brands out there earn loyalty through evidence. Good luck, be safe, and have fun.