My go to load for my gun is 28grains of arcomp, 123eldm,cci 400 loaded to 2.270, getting 2585fps with a magnetospeed out of a 22” jp barrel. This is close to max load, work up in yours. I have the Grendel load books from that forum if your interested in specific load data for a bullet. I’ve read where guys are having issues with newer production sst bullets. Mine are several years old and shoot the same as amax’s and eldm. I have a general assortment of bullets if you want to try some
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