I have both...of the two I'd pick the 300 BLK....
The Nosler 125 BT would be an excellent choice....or 125 SST..
Just a really easy cartridge to shoot...low report/recoil......
Only have had this Ruger a month or so...but I really like it...
Not my deer gun....just a handy truck 'yote or whatever gun...
7# 11 oz as shown....Loves 110 Noslers & A1680 !!