Haven't tried the new 220.... But I've been having good luck with the 212 and H1000, but I have a 27" barrel for the slow burning powders and heavy bullets.
Honestly, if my gun still had your 24" sporter barrel on it, I would be trying the 200gr ELD-x and H4831 (or similar)
Not sure what kind of velocity you'll be able to achieve with the 220 in a 24" but I'd be interested in hearing your results
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