Exactly what jmr40
.30-30 should be dead on - 1" high @100. Most shots will be 50-100 yards and mostly likely, fadt.
At 175-200, you most likely, have mire time to prepare, know it is long, take a good rest, aim just over back.
Do a lot of shooting at 200 yards and learn what 200 yards looks like.
I have seen 125-150 yard shots miss, because the shooter swore UT 200 or a little more and the shot high.
I shoot 120 gr bullets in .30-30, higher velocity and flatter trajectory.
Reload only, lack of bullet selection from factory is the problem. Though, better. When I was a teen, 170gr was ALL you find. 150gr slowly started showing up. The 160FTX is a great bullet.