HuntingNut » News » Some Reloading Statistics

Home • Community Forums • Photo Albums • Register

Modules

• Home - Top 30
• Treasury
• Tell a Friend

Articles: Submit New
• Articles: Topics
• Contact Us
• Community Forums

Members List
• Photo Albums
• PointBlank Ballistics
• PointBlank Online
• Privacy Policy
• Private Messages

Reloading Database
• State F&G Agencies
• Statistics
• Your Account

User Info

Welcome Anonymous

(Register)

Membership:

Latest: IPutMoInYoA

New Today: 0

New Yesterday: 0

Overall: 13131

People Online:

Members: 0

Visitors: 162

BOT: 2

Total: 164

Who Is Where:

Visitors:
01: Photo Albums
02: Forums
03: News
04: Home
05: Forums
06: Forums
07: Photo Albums
08: Forums
09: Home
10: Forums
11: Forums
12: Photo Albums
13: Forums
14: Home
15: Forums
16: Forums
17: Forums
18: Forums
19: Your Account
20: Photo Albums
21: Forums
22: Your Account
23: Home
24: Your Account
25: Photo Albums
26: Forums
27: Your Account
28: Home
29: Home
30: Forums
31: Photo Albums
32: Your Account
33: Forums
34: Forums
35: Forums
36: Forums
37: Your Account
38: Forums
39: Forums
40: Forums
41: Forums
42: Home
43: Home
44: Forums
45: Forums
46: Your Account
47: News
48: Forums
49: Photo Albums
50: Forums
51: Your Account
52: Forums
53: Your Account
54: Home
55: Home
56: News
57: Home
58: Photo Albums
59: Your Account
60: Statistics
61: Forums
62: Home
63: Forums
64: Forums
65: Home
66: Photo Albums
67: Photo Albums
68: Photo Albums
69: Forums
70: Forums
71: Your Account
72: News
73: Forums
74: Forums
75: Forums
76: Photo Albums
77: Photo Albums
78: Home
79: Your Account
80: News
81: Forums
82: Photo Albums
83: Forums
84: Forums
85: Home
86: Forums
87: Forums
88: Forums
89: Your Account
90: Home
91: Home
92: Forums
93: Your Account
94: Forums
95: Home
96: Forums
97: Forums
98: Photo Albums
99: Forums
100: Your Account
101: Photo Albums
102: Forums
103: Forums
104: Forums
105: Forums
106: Photo Albums
107: Forums
108: Home
109: Forums
110: Home
111: Your Account
112: Forums
113: Forums
114: Home
115: Forums
116: Photo Albums
117: Forums
118: News
119: Forums
120: Photo Albums
121: Photo Albums
122: Forums
123: Forums
124: Photo Albums
125: Forums
126: Forums
127: Forums
128: Forums
129: Forums
130: Forums
131: Your Account
132: Forums
133: Photo Albums
134: Photo Albums
135: Your Account
136: Forums
137: Your Account
138: Home
139: Forums
140: Home
141: Forums
142: Your Account
143: Photo Albums
144: Forums
145: Photo Albums
146: Forums
147: Your Account
148: Forums
149: Forums
150: Forums
151: Forums
152: Home
153: Home
154: Photo Albums
155: Your Account
156: Forums
157: Your Account
158: Forums
159: Forums
160: Forums
161: Forums
162: Photo Albums

BOT:
01: Home
02: Home

Staff Online:

No staff members are online!

Coppermine Stats

Photo Albums

• Albums: 308
• Pictures: 2452
  · Views: 824614
  · Votes: 1316
  · Comments: 86

Some Reloading Statistics

Here are a few statistical numbers we arrive at when reloading and using a chronograph .. Most chronographs compute these figures for you , but they are nice to know how they are arrived at and what they mean .
For this example and to keep it brief we will use a 4 shot string instead of ten shots which gives you a much better set of numbers ..
Hv : the highest velocity recorded in the string
Lv : the lowest velocity recorded in the string
Es : Extreme Spread of the string
Av : Average velocity of the string fired
Sd : Standard Deviation , a measure of how close each shot will be to the average ...
Also I'm throwing in how to calculate ft lbs of energy and Taylor Knock Out Value , as well as number of loads per pound of powder

OK here we go with our 4 shot string

1. 2990 fps
2. 3010 fps
3. 2996 fps
4. 3004 fps

Hv = 3010
Lv = 2990
Es = 20 fps , the difference between the high and low velocities
Av = total of each velocity divided by the number of shots fired 2990+3010+2996+3004/4 or 3000fps Av
Sd is derived by multiplying the square root of the average velocity by the number of shots fired , and deduct it from the squares of all shot velocities -1 and then take the square root of this figure ..
[(2990sq+3010sq+2996sq+3004sq-4x3000sq)/(4-1)]sq= SD

54.68+54.86+54.74+54.81/3

219/3=73
73sq=8.54
Sd= 8.54 fps , or each shot will be within 8.54 fps of the average ..

FtLbs of energy is derived by the following :

velocity x velocity x bullet weight / 450240

For a 405 grain bullet at 2500 fps it will look like this

2500x2500x405/450240 = 5622 ft lbs

Taylor Knock Out Value is derived by the following formula :

bullet weight x velocity x diameter/7000

405 x 2500 x .458 / 7000

TKO of 66

Number of loads per pound of powder
There are 7000 grains in one pound of powder , so simply divide 7000 by the charge weight you are loading

Lets say you are loading 80 grains of powder in yur .17 souper mag ele slayer

7000/80 =87.5 loaded rounds per pound of powder ..

Posted by GroovyJack on Monday, July 23, 2007 (03:42:19) (10950 reads) [ Administration ]