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We find that at $\\beta=6/g^2\\equiv5.3$ the matching does not occur over a range extending down to $\\beta=3.5$. For $\\beta=5.5$ matching may be achieved at $\\beta=4.8-4.9$, leading to a $\\Delta \\beta =0.6-0.7$ which is higher than the perturbative 2-loop value of 0.45. 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