If I couldn't find an accurate JSB pellet I would try some H&N. H&N Baracuda Match are more consistent in head size and weight than the JSBs I've measured. But I do not know any reliable way to predict what a gun will like. I've shot 200s on the 30 yard challenge match with 22 caliber H&N Baracuda Match and 22 caliber 18 grain H&Ns. Both were shot straight from the tin. I have one gun that prefers JSBs but it does not seem as accurate.
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