Conditions were a bit odd today: Cool and heavily overcast with gusting, blustery winds. I felt like I was doing a good job, but the winds weren't going to let me get another dot. Here's what I got at 150: All rounds were 31.3gns IMR4350 with 88 ELDs. Bottom right, cycling clockwise: Seat .065", 0.055", 0.050", 0.045", 0.040", and 0.035" from the lands. Looks inconclusive to me; I don't think they are particularly sensitive to depth but I'll need much calmer conditions to know. After shooting these groups, the clouds burned away and the sun came out. I had my RPR with me and pulled it out: If you look close you'll see a white rock, 6MOA right and ~4MOA low in the scope view. I don't know the range, but it took 58MOA and a flight time around 3 seconds (147ELD at 2750fps) to get there. Hornady's 4DOF suggests this may be just beyond 1500 yards and right on the edge of supersonic! I needed 3 rounds to walk onto it (nice splash signature today made it easier than usual), then managed 7 hits in a row. I was really kinda miffed that I had shot up all the 22BR earlier in the bad conditions cause things were clearly very calm and steady! This is the furthest distance I've made hits at.