Part of the equation is your load. That .440 round ball is nearly 100 grains of lead lighter than a .530 round ball. So less inertia at impact, but quite possibly faster velocity which equals flatter trajectory. At impact the velocity may make up a little bit for the lower mass. So broadside to a deer your load should cleanly harvest the animal.
Your avatar lists you at 38 yoa, so you can probably see well. So let's talk about sights. I have owned accurate rifles with poor sights. The problem was the builder or the manufacturer used a honking-thick [sorry for the technical term :grin: ] front sight post. Shooting at an 8" bull at 100 yards was like trying to center a quarter on top of the broadside of a 2x4. :shocked2: I got poor groups from 75 to 100 yards until I swapped out the front sight post to a thin blade. In a friend's case, the slot in the rear, open sight was so wide it was tough to really get the front sight blade centered, but when he replaced the rear sight with a much smaller opening, his groups tightened up. So the load may be sufficiently powered, and barrel accurate, but your sights might need an upgrade.
With a proper load, and with good sights, an accurate barrel, ..., your final question is
you. As the others have written, how well do you shoot that particular rifle at 100 yards? You may see well, the sights may be very good, the load is accurate from a sandbag stabilized position on a shooting bench, but that doesn't mean the rifle fits you well, or that the trigger and lock time are good either. So the final test would be to see what groups
you get at 100 yards. Also..., if you can (as some ranges require you to stand or sit at a bench), try to test using some of the firing positions that you use to hunt. For example, I've harvested deer sitting, "kneeling-unsupported" which was painfully cramping, and standing with a tree helping support my wear arm...quite different than from a bench at the range.
So with some of those factors addressed, then you'll know.
LD