Do you have bullet drop for the 450 Bushmaster

From a friend - All bullet drop depends on the bullet weight, load and barrel. So, a 450 bushmaster with 20" barrel on it and done some work with it the past few days. After some trouble dialing in the scope multiple times I finally got it on at 100 yards. With a 100 yard zero (around 1.5" groups which isn't too good but I believe it is due to my scope which is going to get replaced shortly) we shot it out at 300 yards to see what it would do. We calculated the drop to be approximately 30" with the 100 yard zero. First few shots we were not on paper so we raised hold point up a few inches and we had our first mark. After 2 more shots we had a group to measure from. Back at the house we measured the 3 shot group at 300 yards to be 7.5 inches. (again I am confident this can perform better with a better optic) and 37.5" low. With a 2000 fps velocity and 250 gr bullet from Hornady, it puts the ballistics at

100 yrds- 0" drop, 2030 ft lbs energy, 1912 fps
200 yrds- 9.5" drop, 1067 ft lbs energy, 1386 fps
300 yrds- 37.5" drop, 760 ft obs energy, 1170 fps