That's very similar to my x-bolt 30-06 that is getting cut down to 18" for a Banish Backcountry. I have the same powders on hand and am evaluating bullet selection, wondering if I should go down to 150-155gr to keep good velocities at ~400 yds. what velocities are you getting for your 160 and 180gr pills?I have a tikka 30-06 with an 18” barrel. I shoot it suppressed with a TBAC ultra 7 ..... It’s incredibly accurate with 180g Accubonds and 165g partitions, I use lapua brass and either h4831sc or h4350. I keep it sighted in about 2.5” high at 100 yards.