Ballistic Coefficients on Molds

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