I got 2nd place in Gas gun for the season last year with a 24" Bartlein 1:7.5" bull barrel in 6mm ARC. If I recall it was within 5 points on the match and came down to a single stage that Jeff beat me with his 22 CM. Cartridge/rifle wasn't the determining factor IMO-- Jeff shot a better match.
At any rate, here are a couple of test strings from development of that system. Bear in mind these are at 200yd so cut in half for MOA. ETA: Also bear in mind I don't usually take the time to update environmental data in the Oehler system so the displayed BC's are not necessarily accurate.
Was messing with the factory 108 Match powder (similar to LVR) and 110 Atips. Didn't like the velocity spreads and didn't run it.
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15 shot string with book max charge (gas gun data) of Varget and 110 A-tip. This ran slow but was what I ended up taking to the finale.
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20 rounds of Factory 108 Match. Ran this early in the season at Cameo.
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