I did an antelope hunt last year- shot 2 yearlings. Had fun - trying to decide if I want to go back or go hunt elsewhere. I bought boots, range finder, back pack - in that order. Already have a decent rifle - 30-06 model 70.
Spent summer shooting at range - furthest range was 250 yards. I normally shoot okay but this dialed me in so that there were no odd fliers and all the shooting removed the flinch I had. Forgetting the logistics exactly, I set it up for the longest point of aim shot I could take, assuming an 8-inch vital. The bullet hit low at 150 and a couple inches high at 250 and was dead nuts to 330 or so. Think I went to the range 6 or 7 times and shot 150-200 rounds total. Nothing crazy, being a gun hunter, we just need to refine a few things.
Back to the antelope - I had been given advice from several folks - never hold off the animal, they always appear further than they are. So, when that first shot arrived, I made it (25 yards - yes, twenty-five) and later when that second shot arrived (340 yards - more like it right?), I held higher but on hair and it made a meaty "whap" hitting critter thru center of shoulder.
Fast forward to this year - I haven't adjusted the rifle since the antelope hunt and made 100 yard and 220 yard shots on whitetails.
Guy I hunted antelope with had a dial-up scope. He purchased it and had to send in the ballistics of his bullets. They sent him a dial set for his gun exactly. He made two 300-yard shots. That seems like a good was to go as well.
I'm gonna get a new scope and don't know if I want to dial it or just set it an go. I can shoot 1,000 feet without adjusting the scope... The trajectory doesn't drop too bad until after about 400 yards.
My advice for you is to get more range time. A range finder is cheap insurance and some also calculate trajectory if you can read thru the manual and figure it out. I might do that for a 2019 mule deer hunt...