That would be up to you, most 223 Handi owners load to SAAMI recommended COLs, Barnes recommends .050" off the lands with all of their X-bullets, and doesn't list COLs for any of their loads, that doesn't help much in the deep throated H&R .223 barrels, there's no reaching the lands until you get up in the 70+gr bullets for the most part, which don't shoot in the 1:12" barrels, and most 1:9" barrels don't do well with them either. :-\
I just looked at the HODGDON manual and it listed the 50gr bullet a 3,1660 not sure about the FPS with the BARNES coated bullets. I have heard that you might gain 150 to 200 FPS with these coated bullets. I just go with the tightest group and load from there.
I'm not looking to burn out a barrel, just hunting accuracy, and bullet performance. These ought to handle anything from groundhog, fox, coyote, and even whitetail deer given the right shot placement and yardage.
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