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I always try and use a one piece mount. I just ordered mine for a new T3 from Opticsplanet.com, about $100 all in. Let me know if you would like the link?
Warne are easy to find I have them on a tikka they are good and they clamp on. I also have the talleys also good but no placement adjustment for the rear ring, they don’t clamp on and you need to take care to tighten them in line