Way overkill. The 30-30 harvested more good meat than any other round. Twice, using a 30-30 I've shot a mule deer buck in the tail bone as it ran away from me and only wasted a chunk of meat about the size of my fist each time. But of course, the 30-30 is a very inferior round. The 30-30 flat nose 150 grain bullet had a mussel velocity of 2350' per sec., only 947 ft. pounds at 200 yds, a rise of 3.2" at 100 yds when sighted at 200 yds and typically the rifles that shot that round were horribly inaccurate.
What you need is 30-30 velocities with low trajectory, long range capability, and an inherently accurate round in one of the new high precision rifles. Enter the 6.5 Grendel (.264") with a 123 grain bullet in an AR15 with 2350' per sec mussel velocity, 1200 ft lbs at 200 yds, a rise of only 1.75" at 100 yds when sighted at 200 yards, and sub MOA accuracy.
In comparison, a 25-06 117 grain bullet has a mussel velocity of 3030', 1648 ft lbs at 200 yds and a rise of 1.5" at one hundred yards when sighted at 200 yds.
At 200 yards the Grendel has 127% of the energy of the 30-30. At 200 yards the Grendel as about the same energy as the 30-30 at 100 yrds. At 200 yrds the 25-06 has 174% if the 30-30 energy, way overkill for a little ole whitetail deer that has the size and life tenacity of a dog. The whole story is told when you put the 25-06 round next to the 6.5 Grendel round.
Most of us shooters still live in a dinosaur age, packing obsolete weapons when much better modern rounds are available, and the worst offenders are ignorant salesmen behind gun counters.