The American Winchester .22lr ammo is rubbish in comparison to the Aussie (factory closed) made stuff. The 42gr subs from Aussie use to be great.
I have had all manner of issues with the American stuff, fliers, fail to fire, failure to extract (cause by variable rim thickness), massive variation in velocity (200+ FPS variation from one packet).
I changed to CCI 40gr HP. Very accurate and no issues over a 1000 or so rounds so far. Brought a bulk amount so I've settled on it.
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