I've been trying them in a 1 in 9 twist 223 Heavy barrel Savage I built in April. To date, I've been getting groups similar to yours at 200 yards and I've even tried jamming them into the lands with no improvement. I used Varget, and 748 to date with unimpressive results. I've gone back to 69 grain SMKs and 70 grain Bergers with far better results.
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