What model the American or the Varmint? One has a 1 in 12 twist, the other a 1 in 9 twist.
The guys around here use .223 (or .222) on Roe Deer (small Deer), technically illegal, the minimum allowable size bullet is 6,5 mm (was also that way in some U.S. states).
Most use a 62 grain hunting bullet. The 70 grain had a tendency to expand slow (if at all) in the small Deer,
Last edited by MudderChuck; 10-12-2018 at 06:45 AM.