Yep. 450 grains is a heavy arrow. There will be some that try and complicate this, but just always keep in mind that as the arrow is going, its slowing down (losing energy) and the further away it gets, the slower it goes and the faster it drops.
Using the sight tape formula that HHA provides, you can get a really clear picture of this. They give you stickers with like 43 different numbers on it. Each number gives you a sticker with yardage marked from 20-60 yds. If you lay them all out and look at them, there's not much measured difference between a setup that is shooting 250 fps and one that's 300 from 20-30 yds. Yeah there's a little bit but not as much as you'd think...ESPECIALLY at the shorter 20-30 yard distance. Now when you start stepping beyond 30-60 yds, that's where the difference is. The slower bows really start dropping after that. But for most bowhunting yardages that we will be shooting, you're measuring in millimeters instead of inches.