Military twist rate is 1 in 200mm (1 in 7.87 inches). European manufacturers appear to have settled on a twist rate of 1 in 220mm (1 in 8.66 inches) for 6.5x55 SE sporting rifles at some time in the 1960s, if not earlier. BSA CF2 rifles use the 1 in 8.66 twist rate, as do CZUB rifles. If I recall correctly, I have also seen that twist rate quoted on the Voere web site.
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