Can't speak to the cartridge but I've had a Ruger M77/22 WMR for years now. It's the All-Weather Laminate with the Target Gray Finish. It's been a great rifle. No problems at all. I put a Green Mountain SS Fluted 18" .920 barrel on it soon after I bought it. (Glad I did because GM discontinued them for some reason). It's my go-to small varmint rifle. The stock trigger is not all that great. But it's an easy fix. I put a Volquartsen Target Sear/Spring in it that really cleaned up the trigger pull beautifully. I don't think Volquartsen still offers them but I'm pretty sure that Timney does.

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