My first load exercise with any new cartridge/rifle is to pick the bullet I want to use and do a ladder test with 10 rounds and from that one trip to the range I have sufficient information to load another 10 to confirm the load and I am set to go
This is the 200yd ladder test for the 6.5 Grendel-Max and you can see that loads 7,8,9, and 10 were right in the center of the vertical vibration swing. I wrote the #10 load wrong and it should have been 2695 rather than 2615 with loads 11 and 12 exiting the barrel on the end of the upward swing with earlier loads all ove the place so I tested two loads with 32.4 and 32.6 and chose the 32.6 load on next range day which confirmed its choice and have used it ever since then to kill dozens of goats for the freezer.
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This is the confirmation target for the 32.6gn load which is the standard load now and out performs the standard Grendel by a decent margin. So two range sessions and it was done. I have switched to the 123gn SST with the same results on paper and better results on animals
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