does anyone know how to do the Math??
Heres my setup..

Merlin Hunters Quest
29 inch draw
65 pound Pull
string loop and peep
Gold Tip 5575' s at 29 and 3/4 inch
95 grain tip

thanks

Go to www.bowjackson.com There is an arrow speed calculator as well as some other neat programs.

in order to get a good Ball park estimation we will also need to know what the Brace heighth of the bow is.

the most accurate way to know what your arrow speed is, is to take your bow to your local pro shop and shoot an arrow through a chronograph this way you will know exactly how fast your bow is launching the arrows.

According to The Archery Program...assuming I' ve done it correctly (still getting used to TAP ) your speed will be 268 fps. The brace height is 7.125" according to TAP. At 20 yds. you will still be going 255 fps and true arrow drop will be 10" .

Awe heck, as long as I have the data in front of me...
R=Range
TD = True Drop
AD = Apparent Drop
W = Wind Drift
KE = Kinetic Energy
S = Speed

R TD AD W KE S
0 0 -4 0 61.01 267.79
1 -0.02 -3.32 0 60.78 267.11
2 -0.1 -2.7 0 60.47 266.42
3 -0.22 -2.12 0 60.16 265.74
4 -0.39 -1.59 0 59.85 265.07
5 -0.61 -1.11 0 59.55 264.39
6 -0.88 -0.68 0 59.24 263.72
7 -1.2 -0.3 0 58.94 263.05
8 -1.57 0.03 0 58.64 262.38
9 -1.99 0.31 0 58.35 261.71
10 -2.46 0.54 0 58.05 261.05
11 -2.98 0.72 0 57.76 260.39
12 -3.56 0.84 0 57.47 259.73
13 -4.18 0.92 0 57.17 259.07
14 -4.86 0.94 0 56.89 258.42
15 -5.58 0.92 0 56.6 257.76
16 -6.36 0.84 0 56.31 257.11
17 -7.2 0.7 0 56.03 256.46
18 -8.08 0.52 0 55.75 255.82
19 -9.02 0.28 0 55.47 255.17
20 -10.01 0 0 55.19 254.53
21 -11.06 -0.36 0 54.91 253.89
22 -12.16 -0.76 0 54.64 253.25
23 -13.31 -1.21 0 54.36 252.62
24 -14.52 -1.72 0 54.09 251.98
25 -15.78 -2.28 0 53.82 251.35
26 -17.1 -2.9 0 53.55 250.72
27 -18.47 -3.57 0 53.28 250.1
28 -19.9 -4.3 0 53.02 249.47
29 -21.38 -5.08 0 52.75 248.85
30 -22.92 -5.92 0 52.49 248.23
31 -24.52 -6.82 0 52.23 247.61
32 -26.17 -7.77 0 51.97 247
33 -27.88 -8.78 0 51.71 246.38
34 -29.65 -9.85 0 51.45 245.77
35 -31.47 -10.97 0 51.2 245.16
36 -33.36 -12.16 0 50.95 244.55
37 -35.3 -13.4 0 50.69 243.95
38 -37.3 -14.7 0 50.44 243.35
39 -39.35 -16.05 0 50.2 242.75
40 -41.47 -17.47 0 49.95 242.15
41 -43.65 -18.95 0 49.7 241.55
42 -45.88 -20.48 0 49.46 240.96
43 -48.18 -22.08 0 49.22 240.36
44 -50.53 -23.73 0 48.98 239.78
45 -52.95 -25.45 0 48.74 239.19
46 -55.43 -27.23 0 48.5 238.6
47 -57.96 -29.07 0 48.26 238.02
48 -60.56 -30.96 0 48.02 237.44
49 -63.22 -32.93 0 47.79 236.86
50 -65.95 -34.95 0 47.56 236.28
51 -68.73 -37.04 0 47.33 235.71
52 -71.58 -39.18 0 47.1 235.14
53 -74.49 -41.4 0 46.87 234.57
54 -77.47 -43.67 0 46.64 234
55 -80.51 -46.01 0 46.42 233.43
56 -83.61 -48.41 0 46.19 232.87
57 -86.78 -50.88 0 45.97 232.31
58 -90.01 -53.41 0 45.75 231.75
59 -93.3 -56.01 0 45.53 231.19
60 -96.67 -58.67 0 45.31 230.63
61 -100.09 -61.4 0 45.1 230.08
62 -103.59 -64.19 0 44.88 229.53
63 -107.15 -67.05 0 44.67 228.98
64 -110.77 -69.98 0 44.45 228.44
65 -114.47 -72.97 0 44.24 227.89
66 -118.23 -76.03 0 44.03 227.35
67 -122.06 -79.16 0 43.82 226.81
68 -125.95 -82.36 0 43.61 226.27
69 -129.92 -85.62 0 43.41 225.74
70 -133.95 -88.96 0 43.2 225.2
71 -138.05 -92.36 0 43 224.67
72 -142.23 -95.83 0 42.8 224.14
73 -146.47 -99.37 0 42.6 223.62
74 -150.78 -102.99 0 42.4 223.09
75 -155.16 -106.67 0 42.2 222.57
76 -159.62 -110.42 0 42 222.05
77 -164.14 -114.25 0 41.81 221.53
78 -168.74 -118.15 0 41.61 221.02
79 -173.41 -122.11 0 41.42 220.5
80 -178.15 -126.16 0 41.23 219.99
81 -182.96 -130.27 0 41.04 219.48
82 -187.85 -134.46 0 40.85 218.97
83 -192.81 -138.72 0 40.66 218.47
84 -197.84 -143.05 0 40.47 217.97
85 -202.95 -147.46 0 40.29 217.47
86 -208.13 -151.94 0 40.1 216.97
87 -213.39 -156.5 0 39.92 216.47
88 -218.72 -161.14 0 39.74 215.98
89 -224.13 -165.85 0 39.55 215.48
90 -229.62 -170.63 0 39.38 215
91 -235.18 -175.49 0 39.2 214.51
92 -240.82 -180.43 0 39.02 214.02
93 -246.53 -185.45 0 38.84 213.54
94 -252.33 -190.54 0 38.67 213.06
95 -258.2 -195.72 0 38.5 212.58
96 -264.15 -200.97 0 38.32 212.1
97 -270.18 -206.3 0 38.15 211.63
98 -276.29 -211.71 0 37.98 211.16
99 -282.48 -217.2 0 37.81 210.69
100 -288.74 -222.77 0 37.65 210.22
101 -295.09 -228.42 0 37.48 209.75
102 -301.52 -234.15 0 37.31 209.29
103 -308.04 -239.96 0 37.15 208.83
104 -314.63 -245.85 0 36.99 208.37
105 -321.3 -251.83 0 36.82 207.91
106 -328.06 -257.89 0 36.66 207.46
107 -334.9 -264.03 0 36.5 207.01
108 -341.83 -270.26 0 36.34 206.56
109 -348.84 -276.57 0 36.19 206.11
110 -355.93 -282.96 0 36.03 205.66
111 -363.11 -289.44 0 35.88 205.22
112 -370.37 -296.01 0 35.72 204.78
113 -377.72 -302.66 0 35.57 204.34
114 -385.16 -309.4 0 35.42 203.9
115 -392.68 -316.22 0 35.27 203.47
116 -400.29 -323.13 0 35.12 203.04
117 -407.99 -330.13 0 34.97 202.61
118 -415.77 -337.22 0 34.82 202.18
119 -423.65 -344.39 0 34.67 201.75
120 -431.61 -351.65 0 34.53 201.33
121 -439.66 -359.01 0 34.38 200.91
122 -447.8 -366.45 0 34.24 200.49
123 -456.03 -373.98 0 34.1 200.07
124 -464.36 -381.61 0 33.96 199.66
125 -472.77 -389.33 0 33.82 199.25
126 -481.28 -397.13 0 33.68 198.84
127 -489.87 -405.03 0 33.54 198.43
128 -498.56 -413.03 0 33.4 198.02
129 -507.35 -421.11 0 33.27 197.62
130 -516.22 -429.29 0 33.13 197.22
131 -525.2 -437.56 0 33 196.82
132 -534.26 -445.93 0 32.87 196.42
133 -543.42 -454.4 0 32.73 196.03
134 -552.68 -462.96 0 32.6 195.64
135 -562.03 -471.61 0 32.47 195.25
136 -571.48 -480.36 0 32.35 194.86
137 -581.03 -489.21 0 32.22 194.47
138 -590.68 -498.16 0 32.09 194.09
139 -600.42 -507.21 0 31.97 193.71
140 -610.26 -516.35 0 31.84 193.33
141 -620.2 -525.6 0 31.72 192.96
142 -630.24 -534.94 0 31.59 192.58
143 -640.38 -544.38 0 31.47 192.21
144 -650.62 -553.93 0 31.35 191.84
145 -660.97 -563.58 0 31.23 191.48
146 -671.41 -573.32 0 31.11 191.11
147 -681.96 -583.17 0 31 190.75
148 -692.61 -593.13 0 30.88 190.39
149 -703.36 -603.19 0 30.76 190.03
150 -714.22 -613.35 0 30.65 189.68