Ladder test results. BAT 3L, Krieger 8.5 twist 28" long Med. Palma contour, Robinson prone stock, Masterclass pattern. Shot from rest on bench. Ladder test shot at 300 yds. RL 15, JLK 130 VDL temp. 65 degrees at Ben Avery, Phoenix. Light 5-10 MPH wind, Second firing on resized Lapua cases, Redding die .290 bushing CCI 450 primers, no neck turn .294 chamber. Bullets seated at jamb length with light neck tension. Total ladder 37.0 to 40.0 in .2 increments. Total vertical for all 16 loads 1.562; total horizontal 2.625. Same aim point for all shots with little concern for wind. 38.0, 38.2, 38.4 = less than 1/4" vertical. Next best was 38.6, 38.8, 39.0 = less than 3/8 vertical. Third best load 39.4, 39.6, 39.8 at about 1/2" vertical. No chronograph, so I don't know velocities. Top load in ladder was 40.0 with no pressure problems. Usual remarks, my rifle, my loads, start low work up be careful, do not rely on this post except for report of my results on that day. Best 3 shot sequence group during test, not very relevant because same aim point and not much attention to wind but FYI was 5/8" for 38.0, 38.2 and 38.4 loads, less than 1/4 vertical.