I shoot the rifle single shot, I've installed a singleshot follower, so I seat them way out there. Mine also has a long throat, so It's necessary if you want to seat them to the lands.
I found the powder, but I haven't picked it up. they only had one pound and told me it's hard to come by for some reason???, so I'm now debating whether to use it at all. I have retumbo and US869 and I'll work with them both first. If no sucess, I'll go to N170.
I've posted this photo before, but it has a pic of my 7stw loads seated out to .004" off the lands.
You can see that they are quite long. I shoot 160g Game kings as well and seat them to fit the magazine. I've decided that if I want that long range hammer, gotta shoot it single shot.....
You've seen the rifle in another post as well. It's getting a Bell and Carlson M40 Tactical stock this month as well as new bottom metal. This origional stock isn't balanced well and doesn't have a wide enough forearm to shoot off of bags. I'll be shooting the test loads after this is done.