It's just too slow for the handguns. QuickLOAD shows very low efficiency and a lot of unburned powder being tossed out in those rounds. In .223 it comes out very close in performance to IMR 4198 and H4198 by weight, except it's more dense, so it doesn't fill the case as well in these. That relegates it to light bullet duty, and with the 35 and 40 grain Hornady bullets you can get to 90% case fill with it, which should be OK. It looks to be at its best in the .22 Hornet and K-hornet.
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