Pure lead
balls per pound
In older literature, the bore size of Kentucky rifles is
often described in balls per pound. The first graph below provides an overview
of ball diameter for a given number of pure lead balls per pound, and
includes the equation I used to generate the data. In the table that follows
the graph, ball diameter is rounded to the nearest ten-thousandth of an inch.
L. Dietle, March 23, 2023
|
Lead
balls per pound |
Lead
ball diameter, inches |
|
1 |
1.6705 |
|
2 |
1.3262 |
|
3 |
1.1587 |
|
4 |
1.0528 |
|
5 |
0.9774 |
|
6 |
0.9199 |
|
7 |
0.8738 |
|
8 |
0.8358 |
|
9 |
0.8037 |
|
10 |
0.7760 |
|
11 |
0.7517 |
|
12 |
0.7303 |
|
13 |
0.7111 |
|
14 |
0.6937 |
|
15 |
0.6780 |
|
16 |
0.6636 |
|
17 |
0.6503 |
|
18 |
0.6380 |
|
19 |
0.6266 |
|
20 |
0.6160 |
|
21 |
0.6061 |
|
22 |
0.5968 |
|
23 |
0.5880 |
|
24 |
0.5797 |
|
25 |
0.5719 |
|
26 |
0.5645 |
|
27 |
0.5574 |
|
28 |
0.5507 |
|
29 |
0.5443 |
|
30 |
0.5382 |
|
31 |
0.5324 |
|
32 |
0.5268 |
|
33 |
0.5214 |
|
34 |
0.5163 |
|
35 |
0.5113 |
|
36 |
0.5065 |
|
37 |
0.5019 |
|
38 |
0.4975 |
|
39 |
0.4932 |
|
40 |
0.4891 |
|
41 |
0.4851 |
|
42 |
0.4812 |
|
43 |
0.4774 |
|
44 |
0.4738 |
|
45 |
0.4702 |
|
46 |
0.4668 |
|
47 |
0.4635 |
|
48 |
0.4602 |
|
49 |
0.4571 |
|
50 |
0.4540 |
|
51 |
0.4511 |
|
52 |
0.4481 |
|
53 |
0.4453 |
|
54 |
0.4425 |
|
55 |
0.4399 |
|
56 |
0.4372 |
|
57 |
0.4347 |
|
58 |
0.4321 |
|
59 |
0.4297 |
|
60 |
0.4273 |
|
61 |
0.4249 |
|
62 |
0.4226 |
|
63 |
0.4204 |
|
64 |
0.4182 |
|
65 |
0.4161 |
|
66 |
0.4139 |
|
67 |
0.4119 |
|
68 |
0.4098 |
|
69 |
0.4079 |
|
70 |
0.4059 |
|
71 |
0.4040 |
|
72 |
0.4021 |
|
73 |
0.4003 |
|
74 |
0.3985 |
|
75 |
0.3967 |
|
76 |
0.3949 |
|
77 |
0.3932 |
|
78 |
0.3915 |
|
79 |
0.3899 |
|
80 |
0.3883 |
|
81 |
0.3867 |
|
82 |
0.3851 |
|
83 |
0.3835 |
|
84 |
0.3820 |
|
85 |
0.3805 |
|
86 |
0.3790 |
|
87 |
0.3776 |
|
88 |
0.3761 |
|
89 |
0.3747 |
|
90 |
0.3733 |
|
91 |
0.3720 |
|
92 |
0.3706 |
|
93 |
0.3693 |
|
94 |
0.3680 |
|
95 |
0.3667 |
|
96 |
0.3654 |
|
97 |
0.3641 |
|
98 |
0.3629 |
|
99 |
0.3617 |
|
100 |
0.3605 |
|
101 |
0.3593 |
|
102 |
0.3581 |
|
103 |
0.3569 |
|
104 |
0.3558 |
|
105 |
0.3546 |
|
106 |
0.3535 |
|
107 |
0.3524 |
|
108 |
0.3513 |
|
109 |
0.3503 |
|
110 |
0.3492 |
|
111 |
0.3481 |
|
112 |
0.3471 |
|
113 |
0.3461 |
|
114 |
0.3451 |
|
115 |
0.3441 |
|
116 |
0.3431 |
|
117 |
0.3421 |
|
118 |
0.3411 |
|
119 |
0.3402 |
|
120 |
0.3392 |
|
121 |
0.3383 |
|
122 |
0.3374 |
|
123 |
0.3364 |
|
124 |
0.3355 |
|
125 |
0.3346 |
|
126 |
0.3338 |
|
127 |
0.3329 |
|
128 |
0.3320 |
|
129 |
0.3311 |
|
130 |
0.3303 |
|
131 |
0.3295 |
|
132 |
0.3286 |
|
133 |
0.3278 |
|
134 |
0.3270 |
|
135 |
0.3262 |
|
136 |
0.3254 |
|
137 |
0.3246 |
|
138 |
0.3238 |
|
139 |
0.3230 |
|
140 |
0.3222 |
|
141 |
0.3215 |
|
142 |
0.3207 |
|
143 |
0.3200 |
|
144 |
0.3192 |
|
145 |
0.3185 |
|
146 |
0.3178 |
|
147 |
0.3171 |
|
148 |
0.3163 |
|
149 |
0.3156 |
|
150 |
0.3149 |
|
151 |
0.3142 |
|
152 |
0.3135 |
|
153 |
0.3129 |
|
154 |
0.3122 |
|
155 |
0.3115 |
|
156 |
0.3108 |
|
157 |
0.3102 |
|
158 |
0.3095 |
|
159 |
0.3089 |
|
160 |
0.3082 |
|
161 |
0.3076 |
|
162 |
0.3070 |
|
163 |
0.3063 |
|
164 |
0.3057 |
|
165 |
0.3051 |
|
166 |
0.3045 |
|
167 |
0.3039 |
|
168 |
0.3033 |
|
169 |
0.3027 |
|
170 |
0.3021 |
|
171 |
0.3015 |
|
172 |
0.3009 |
|
173 |
0.3003 |
|
174 |
0.2997 |
|
175 |
0.2992 |
|
176 |
0.2986 |
|
177 |
0.2980 |
|
178 |
0.2975 |
|
179 |
0.2969 |
|
180 |
0.2964 |
|
181 |
0.2958 |
|
182 |
0.2953 |
|
183 |
0.2947 |
|
184 |
0.2942 |
|
185 |
0.2937 |
|
186 |
0.2932 |
|
187 |
0.2926 |
|
188 |
0.2921 |
|
189 |
0.2916 |
|
190 |
0.2911 |
|
191 |
0.2906 |
|
192 |
0.2901 |
|
193 |
0.2896 |
|
194 |
0.2891 |
|
195 |
0.2886 |
|
196 |
0.2881 |
|
197 |
0.2876 |
|
198 |
0.2871 |
|
199 |
0.2866 |
|
200 |
0.2862 |
|
201 |
0.2857 |
|
202 |
0.2852 |
|
203 |
0.2847 |
|
204 |
0.2843 |
|
205 |
0.2838 |
|
206 |
0.2834 |
|
207 |
0.2829 |
|
208 |
0.2824 |
|
209 |
0.2820 |
|
210 |
0.2815 |
|
211 |
0.2811 |
|
212 |
0.2807 |
|
213 |
0.2802 |
|
214 |
0.2798 |
|
215 |
0.2793 |
|
216 |
0.2789 |
|
217 |
0.2785 |
|
218 |
0.2781 |
|
219 |
0.2776 |
|
220 |
0.2772 |
|
221 |
0.2768 |
|
222 |
0.2764 |
|
223 |
0.2760 |
|
224 |
0.2756 |
|
225 |
0.2752 |
|
226 |
0.2747 |
|
227 |
0.2743 |
|
228 |
0.2739 |
|
229 |
0.2735 |
|
230 |
0.2731 |
|
231 |
0.2727 |
|
232 |
0.2724 |
|
233 |
0.2720 |
|
234 |
0.2716 |
|
235 |
0.2712 |
|
236 |
0.2708 |
|
237 |
0.2704 |
|
238 |
0.2701 |
|
239 |
0.2697 |
|
240 |
0.2693 |
|
241 |
0.2689 |
|
242 |
0.2686 |
|
243 |
0.2682 |
|
244 |
0.2678 |
|
245 |
0.2675 |
|
246 |
0.2671 |
|
247 |
0.2667 |
|
248 |
0.2664 |
|
249 |
0.2660 |
|
250 |
0.2657 |
|
251 |
0.2653 |
|
252 |
0.2650 |
|
253 |
0.2646 |
|
254 |
0.2643 |
|
255 |
0.2639 |
|
256 |
0.2636 |
|
257 |
0.2632 |
|
258 |
0.2629 |
|
259 |
0.2626 |
|
260 |
0.2622 |
|
261 |
0.2619 |
|
262 |
0.2615 |
|
263 |
0.2612 |
|
264 |
0.2609 |
|
265 |
0.2606 |
|
266 |
0.2602 |
|
267 |
0.2599 |
|
268 |
0.2596 |
|
269 |
0.2593 |
|
270 |
0.2589 |
|
271 |
0.2586 |
|
272 |
0.2583 |
|
273 |
0.2580 |
|
274 |
0.2577 |
|
275 |
0.2574 |
|
276 |
0.2571 |
|
277 |
0.2567 |
|
278 |
0.2564 |
|
279 |
0.2561 |
|
280 |
0.2558 |
|
281 |
0.2555 |
|
282 |
0.2552 |
|
283 |
0.2549 |
|
284 |
0.2546 |
|
285 |
0.2543 |
|
286 |
0.2540 |
|
287 |
0.2537 |
|
288 |
0.2534 |
|
289 |
0.2531 |
|
290 |
0.2529 |
|
291 |
0.2526 |
|
292 |
0.2523 |
|
293 |
0.2520 |
|
294 |
0.2517 |
|
295 |
0.2514 |
|
296 |
0.2511 |
|
297 |
0.2509 |
|
298 |
0.2506 |
|
299 |
0.2503 |
|
300 |
0.2500 |
The next
graph below provides an overview of the number of pure lead balls per pound for
a given ball diameter, and includes the equation I
used to generate the data.
