Ahh!
I set it to 12288 and now I am getting:
MMC Agg. SPM: 13.832, HPM: 14.563; Rnds C/I: 101/0, Don. C/I: 59/0; Cfg/Wkr SPM: 13.832/1.1958, Cfg/Wkr HPM: 14.624/1.2187 160 rnds AV=1, ART=49233
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