Ballistic Coefficients on Molds

We have used the form factor method of calculating the ballistic coefficients for our  bullet molds in conjunction with the formula of C = w / i * (d*d)  where C is the coefficient, w is the bullet weight in pounds, i = the form factor and d = the bullet diameter.  For the purposes of our calculations, we have assumed that all bullets will have a muzzle velocity of 2000 f.ps. or less.  Bullet weights are based on 1 part tin to 10 parts lead.

We do not have ballistic coefficients on all of our black powder molds as some are larger than .50 caliber and others have a taperd shank such as the REAL bullet.  These calculations would result in inaccuracies, therefore it is best to determine those through firing and recording the reduced velocity over a given distance. That data can then be entered into our Shooter program which calculates the ballistic coefficient.

Bullet - Ballistic Coefficient

32/20, 32 S& W Long, 32 Colt NP

311-93-1RF-              .125
311-100-2R-              .174
TL314-85-WC-           .054
TL314-90-SWC-        .100

38 Special, 38 S&W, 38 Colt New Police

358-105-SWC -         .106
358-125-RF -             .116
358-140-SWC -         .142
TL358-148-WC -        .072
358-148-WC -            .072
358-150-1R -             .131
358-150-SWC -         .111
TL358-158-SWC -     .117
C358-158-SWC -       .117
TL358-158-2R -         .207
358-158-RF-              .160

9 mm Luger, 38 Super Auto, 380 Auto

356-102-1R -            .105
356-111-1R -            .114
356-120-TC -            .123
TL356-124-2R -        .164
TL356-124-TC -        .127
356-125-2R -            .166
356-153-2R -            .203

9mm Makarov

365-95-1R -              .093

40 S&W, 10 mm

401-145-SWC -       .117
TL401-175-SWC -   .141
401-175-TC -           .141

41 magnum, 41 AE

410-195-SWC -      .110
TL410-210-SWC -  .119
TL410-175-SWC -  .099

44 Special, 44 Magnum, 44 / 40 WCF

429-208-WC -         .070
429-214-SWC -      .111
C429-240-SWC -    .124
429-255-SWC -      .132
429-200-RF -          .124
429-214-1R -          .151
429-240-2R -          .196
TL430-240-SWC -  .169
C430-310-RF -        .218

45 ACP, 45 Auto Rim, 45 Colt

452-190-SWC -      .121
452-200-SWC -      .127
452-200-RF -          .140
TL452-200-SWC -  .127
452-228-1R -          .145
TL452-230-2R -      .189
TL452-230-TC -      .146
452-230-TC -          .146

45 Colt, 45 Casull

452-252-SWC -       .136
452-255-RF -           .210
C452-300-RF -         .233

7mm

C285-130-R -           .305

30 Caliber Rifle

C309-113-F -           .199
C309-120-R -           .163
C309-130-R -           .229
C309-150-F -            .264
C309-160-R -           .252
C309-170-F -            .268
C309-180-R -            .317
C309-200-R -            .352

38-55 / 375 Winchester

379-250-RF -            .249

7.62 x 39

C312-155-2R -         .268
CTL312-160-2R -     .276

7.65 - 7.7 mm, 303 British

C312-185-1R -         .247

8 mm

C324-175-1R -        .216

338 Cal

C338-220-1R -        .250

45-70 Caliber Rifle

457-340-F -             .211
457-405-F -             .225
459-405-HB -          .250
457-450-F -            .250
C457-500-F -         .278
457-500-3R -         .443

480 Ruger, 475 Linebaugh

476-400-RF -         .271

50-70 Caliber

515-450-f-      .220
515-500-f-      .283

Round ball coefficients are based on a velocity of 1000 - 1300 f.p.s at the muzzle.

.308 - .038
.311 - .039
.319 - .040
.330 - .042
.350 - .044
.360 - .045
.375 - .047
.380 - .048
.390 - .049
.395 - .050
.433 - .055
.440 - .056
.445 - .056
.451 - .057
.454 - .057
.457 - .058
.490 - .061
.495 - .062
.498 - .064
.500 - .061
.527 - .067
.530 - .067
.535 - .068
.562 - .071
.575 - .072
.600 - .076
.690 - .087

Conical Bullet Molds

36 Cal .375-130-1r -   .120
44 Cal .450-200-1r-    .128
44 Rug .456-220-1r-   .137

Mini Bullet Mold

58 Caliber 575-500-     .196

Modern Mini, Target Design

Both sizes are .088