Re: Bought my dad a crossbow
Since you went with a very high performance bow, I would suggest a arrow upgrade pretty quick. Most are finding the need for stiffer arrows to get enough spine for consistant accuracy at these speeds. I would suggest the Gold Tip Laser III, IV, Carbon Express Blue Streaks, Easton Full Metal Jackets and possibly Vitctory's Xbolts.
Also watch your string and center serving carefully. The Ghost 400 has been snapping strings quite frequently. The factory Barnett scopes are OK. With time, look at a Hawke for $80. Much better scope and many levels.
As for broadheads, small diamter, short ferrules such as G5 Strikers, Sonics, Razor Tricks, Wasp SST are great for fixed blade. For mechanicals, spitfires are proven in high speed bows.
Best of luck and I wish your father much success.
I support all hunters, regardless of weapon or technique!