Rebel is right about the width and I looked ut the min. weight for Horton and it is 415 grains, but they cheat on their speed chart and use a 385 grain arrow to get speed.
Tar Heel


There's More to an Arrow than Speed
*PLEASE NOTE: Arrows of less than 415 grains should NOT be shot from any compound crossbow. Using arrows weighing less will void the warranty of the bow, could damage the bow and could result in personal injury. The results shown below reflect using a 385 grain arrow which was used for test purposes only.
Arrow Ballistics Comparison




Distance
(yards)
Vertical Drop
(inches)
Speed
(fps)
Energy
(ft. lbs.)

0
- -
345 359
112 110

10
+2 +2
338 352
108 106

20
0 0
331 345
103 102

30
4 2
323 338
100 98

40
13 10
316 329
98 96

50
24 20
309 320
90 87

60
37 33
301 311
86 83
Red: 426 grain-arrow
Black: 385-grain arrow
Tests conducted with a 200-pound Hunter Max 200 and a 100-grain point. Actual results may be more or less, depending on particular arrows used.