I came across a good buy on a new 22 creedmoor barrel (22in) and I can't seem to find much load data for lighter bullets in the 55-62g range. This particular barrel has a 1-10 twist (reason for bargain) so I'm planning on shooting 55-62grain pills. I've got plenty of H4350 so I'd like to shoot it if it will work. But I also have plenty of other powders available.