I am starting to build a load for my 7mm-08 that I plan to shoot in local 600 yard competitions. I am using Lapua brass necked using a Redding S die to 0.310 inches, CCI BR2 primers and Cutting Edge MTH 130 bullet. COAL to start was just fitting into the magazine at 2.808 inches. Cutting Edge sent some initial load data and Alliant RL 17 looked promising.
I have attached pictures of my recent tree analysis. At 44.0 grains an equilateral triangle is produced Fig shown for 44.0 grains and showed the same result for 45.0 grains and 45.5 grains (pictures not shown). At 44.5 grains a tightened group is produced (Fig shown). At 46.0 grains a tightened group is produced but different shape (Fig shown). At 46.5 my last test the group opened up to 3 inches.
Should I concentrate on the 44.5 group or the 46.0 group. Keep in mind the 600 yard distance. Also are these results suggesting I should vary the seating depth.
Thanks
Robert
I have attached pictures of my recent tree analysis. At 44.0 grains an equilateral triangle is produced Fig shown for 44.0 grains and showed the same result for 45.0 grains and 45.5 grains (pictures not shown). At 44.5 grains a tightened group is produced (Fig shown). At 46.0 grains a tightened group is produced but different shape (Fig shown). At 46.5 my last test the group opened up to 3 inches.
Should I concentrate on the 44.5 group or the 46.0 group. Keep in mind the 600 yard distance. Also are these results suggesting I should vary the seating depth.
Thanks
Robert