Your groups will put him down no problem. We practice in the desert 200-600 yards dial shoot starting in spring. When it gets hot, we head to mountains, load packs, hike, dial and shoot rocks. We use the same quick stix setup during practice as we do during season.
First pic is summer practice, second pic she is holding over her bull she shot at 293 yards. He made it around 10 feet. After she dropped him I congratulated her and she said it was such an easy shot. Practice pays off, keep it up and good luck.