https://www.jbmballistics.com/cgi-bin/jbmstab-5.1.cgiI think I read 9.5 twist. Could be wrong tho. I know my Lehigh defense 257 grain ELR bullets carry an .890 BC and need a 9.5 twist barrel. That bullet is 1.900" long
Try this. It’s very easy shooting for 1.5-2