Lots and lots of data out there on 300BLK that will cycle an AR, but less so for a bolt action in 300BLK. I've picked up a Ruger American Ranch and am going to build some loads for it. My goal is to make 3 distinct loads: - ultra light (115 or 125gr) supersonic as fast as possible just for fun - mid-weight (168gr) subsonic for quiet plinking (I have a lot of 168gr SMKs to burn up) - heavy weight (220gr) subsonic for hunting, I guess? Seems like a thing. Using just what I had on hand, I've made up the following. Brass is all once fired commercial, full sized, chamafered, etc. The lots are not all matched but it's all the same lot/headstamp within each test load. I've got a neck sizing die on the way so after this it will just be necked size ('cause bolt action). Winchester primers. Trying for subsonic - 130gr FP - 6.4gr Trailboss 168gr SMK - 5.5gr Unique 168gr SMK - 11.5gr RE7 220gr SMK - 8.4gr Lilgun Supersonic - 130gr FP - 17.8gr 4427 168gr SMK - 14.5gr Lilgun I realize the 130gr flat point are not exactly ultra light or sexy, but they're left over from my 30/30 so I might as well use them to start testing with. Long weekend ahead so I should be able to make it to the range and fire them over the chronograph and for accuracy at 100 yards.