Congrats!! It takes a very steady hand and fine equipment to make such a shot. I have an XP-100R in 260 remington with a burris 3x12. I had a buck that I could not shoot because of lease rules at 460 yards and played with the handgun to see what the shot would look like. I did not get into a position that I felt I could have pulled the trigger. I will need to work on that.
We need more details. Caliber, bullet, scope, ranging equipment, and rest would be good to know.