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Thread: Cast Bullet Ballistic Coefficent Table

  1. #1
    Boolit Master Artful's Avatar
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    Cast Bullet Ballistic Coefficent Table

    As I had difficulty in finding a listing of cast boolit BC's I searched some books and found the following information for those who are interested

    Only internet link I had was
    http://www.lasc.us/ConversionTables.htm

    Quote:
    RCBS Cast Rifle Bullet Ballistic Coefficients
    22-055 FN .159
    243-095 .258
    257-120 .272
    270-150 .327
    7mm-145 Silh. .272
    7mm-168 SP .306
    30-115 SP .175
    30-150 FN .220
    308-165 Silh. .286
    30-180 SP .293
    30-180 FN .255
    35-200 FN .243
    357-180 Silh .210
    375-200 FN .220
    44-200 FN .130
    429-240 Silh .186
    45-300 FN .207
    45-405 FN .303
    45-500 FN .365[/Quote]

    Originally Posted by Uncle Grinch
    I'd be curious where the 6.5 x 55 would fall at in BC. The 140 ~ 160 grain range should be fairly efficient.
    The Lyman 266469 at 1600 fps is .320. The 3rd GB 130 gr bullet is .25 at 2100 fps. Lyman's 266455 is .26 at 2000 fps.

    Larry Gibson
    Lyman 3rd edition cast handbook has in the back the following boolits listed

    225107_.091
    225438_.094
    225415_.116
    225462_.107

    245496_.202
    245497_.230
    245498_.210

    257420_.120
    257312_.208
    257464_.204
    257418_.221
    257325_.235

    280468_.193
    280473_.275
    280412_.245

    287448_.165
    287346_.235
    287405-.245
    287308-.325

    311359_ .181
    311441_.143
    311576_.172
    311465_.163
    311410_.239
    311440_.134
    311466_.250
    301618_.300
    311291_.202
    31141__.220
    311407_.270
    311467_.320
    311344_.340
    301620_.379
    311299_.377
    311290_.305
    311284_.332

    311644 is .272 per mrbill2's info

    323470_.187
    323471_.475
    323378_.410

    375248_.290
    375449_.315
    375167_.315

    .457191_.201
    457122_.274
    457124_.299
    457193_.307
    457102_.359
    457406_.387
    457125_.391
    457132_.384

    515141_.250


    Lyman Pistol and Revolver Handbook

    Ballistic Coefficent handgun bullets

    454424-.210
    454190-.269
    45468-.105

    429244-.201
    429421-.209
    429360-.169
    429215-.188
    429303-.105
    429348-.065

    410426-.235
    410459-.150
    410610-.158
    41028-.160

    358429-.286
    358311-.228
    358156-.213
    358477-.183
    358495-.096
    358460-.145
    356402-.146
    358242-.154
    358345-.121

    257312-.185
    257420-.160

    225415-.162
    225438-.120


    Lyman 46th Edition Reloading Handbook list of Ballistic Coefficent


    Projectile _ Higher than _ Med _ below Velocity
    225107 _ 0.091@2400 _ 0.099 _ 0.108@1800
    225438 _ 0.094@2400 _ 0.107 _ 0.122@1800
    225415 _ 0.116@2400 _ 0.140 _ 0.168@1800
    225462 _ 0.107@2400 _ 0.131 _ 0.152@1800

    245496 _ 0.202@1600 _ 0.215 _ 0.230@1200
    245497 _ 0.230@1600 _ 0.240 _ 0.260@1200
    245498 _ 0.210@1600 _ 0.225 _ 0.245@1200

    257420 _ 0.129@2200 _ 0.152 _ 0.180@1800
    257464 _ 0.204@1800 _ 0.217 _ 0.234@1400
    257312 _ 0.028@1800 _ 0.236 _ 0.273@1400
    257418 _ 0.221@1800 _ 0.253 _ 0.296@1400
    257325 _ 0.235@1800 _ 0.263 _ 0.263@1400

    280468 _ 0.193@2200 _ 0.224 _ 0.254@1600
    280473 _ 0.275@1800 _ 0.290 _ 0.310@1400
    280412 _ 0.245@1800 _ 0.255 _ 0.270@1400

    287448 _ 0.165@2000 _ 0.205 _ 0.245@1600
    287346 _ 0.235@1800 _ 0.265 _ 0.305@1400
    287405 _ 0.245@1600 _ 0.265 _ 0.285@1200
    287308 _ 0.325@1600 _ 0.345 _ 0.365@1200

    311359 _ 0.181@2000 _ 0.182 _ 0.182@1600
    311441 _ 0.143@2200 _ 0.152 _ 0.163@1600
    311576 _ 0.172@1800 _ 0.196 _ 0.220@1400
    311465 _ 0.163@2200 _ 0.171 _ 0.195@1600
    311410 _ 0.239@1600 _ 0.250 _ 0.265@1200
    311440 _ 0.134@2200 _ 0.151 _ 0.171@1600
    311466 _ 0.250@2000 _ 0.250 _ 0.260@1600
    301618 _ 0.300@2400 _ 0.310 _ 0.305@1800
    311291 _ 0.202@2200 _ 0.231 _ 0.250@1600
    31141 _ 0.220@2200 _ 0.250 _ 0.280@1600
    311407 _ 0.270@1800 _ 0.300 _ 0.325@1400
    311467 _ 0.320@2200 _ 0.305 _ 0.300@1600
    311334 _ 0.340@1800 _ 0.312 _ 0.275@1400
    301620 _ 0.379@2200 _ 0.370 _ 0.362@1800
    311299 _ 0.377@1800 _ 0.358 _ 0.390@1400
    311290 _ 0.305@1800 _ 0.300 _ 0.275@1400
    311284 _ 0.332@1800 _ 0.331 _ 0.335@1400

    323470 _ 0.187@2200 _ 0.205 _ 0.225@1600
    323471 _ 0.475@1800 _ 0.450 _ 0.425@1400
    323378 _ 0.410@1600 _ 0.420 _ 0.430@1200

    375248 _ 0.290@1600 _ 0.310 _ 0.325@1200
    375449 _ 0.315@1600 _ 0.348 _ 0.375@1200
    375167 _ 0.315@1600 _ 0.290 _ 0.270@1200

    457191 _ 0.201@1800 _ 0.222 _ 0.240@1400
    457122 HP _ 0.270@1800 _ 0.267 _ 0.265@1400
    457122 _ 0.280@1800 _ 0.274 _ 0.274@1400
    457124 _ 0.300@1800 _ 0.299 _ 0.275@1300
    457193 _ 0.307@1600 _ 0.335 _ 0.365@1200
    457102 _ 0.359@1600 _ 0.355 _ 0.350@1200
    457121 _ 0.436@1600 _ 0.430 _ 0.420@1200
    457406 _ 0.387@1600 _ 0.380 _ 0.370@1200
    457125 _ 0.391@1600 _ 0.380 _ 0.380@1200
    457132 _ 0.384@1500 _ 0.375 _ 0.370@1100

    515141 _ 0.250@1600 _ 0.250 _ 0.225@1200

    Please feel free to add any more you have give the source.

  2. #2
    Boolit Master w30wcf's Avatar
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    Artful,
    Many thanks for your work on putting together the list of b.c's.

    Regarding the 311644, I believe the b.c. would be closer to .330 if made in w.w which brings the weight to 202 grs. (my mold)

    The reason I say that is that the nose profile is the same as the 180 RCBS which has a reported b.c. of .293. With the 12% increase in weight, the b.c. would be .328.

    In actual firing test at 500 meters with my 788 30-30, at 2,200 f.p.s. launch velocity, the 311644 comes very close to the 311299 which has a reported .377 b.c.

    w30wcf
    aka w44wcf
    aka Jack Christian SASS 11993 "I can do all things through Christ who strengthens me." Philippians 4:13
    aka John Kort
    NRA Life Member
    .22 W.C.F., .30 W.C.F., .44 W.C.F. Cartridge Historian

  3. #3
    Boolit Master mrbill2's Avatar
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    Artful
    Mr. w30wcf's numbers could be right on. The number I gave you was the answer to my B. C. question on another form. If this New Lyman Loading Book ever get becomes a reality, maybe they have included that info. Last I read, it should be out in Oct. They didn't give the year.
    Mr. Bill2

  4. #4
    Boolit Master mrbill2's Avatar
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    Artful
    Just a update to the question about the BC of the Lyman 311644. Printed in the NEW Lyman cast bullet manual #4 the bc for that bullet is indeed "272"
    Mr. Bill2

  5. #5
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    I saw this a while back and searched it out and used it more than once, it's about time I posted a thanks!

    Gear
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  6. #6
    Boolit Master


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    Here are some for Lee molds.
    I started a spread sheet several years ago to try and save sometime looking them up.

    Lee, 311-093-1R, .106, ,
    Lee, 311-100-2R, .174, ,
    Lee, 314-93-SWC, .100, ,
    Lee, 358-105-SWC, .116, ,
    Lee, 358-140-SWC, .142, ,
    Lee, TL358-148-WC, .072, ,
    Lee, 358-148-WC, .072, ,
    Lee, 358-150-SWC, .117, ,
    Lee, C358-158-SWC, .117, ,
    Lee, TL358-158-2R, .207, ,
    Lee, 358-158-RF, .160, ,
    Lee, 356-102-1R, .105, ,
    Lee, 356-120-TC, .123, ,
    Lee, TL 356-124-2R, .164, ,
    Lee, TL356-124-TC, .127, ,
    Lee, 356-125-2R, .166, ,
    Lee, 365-95-1R, .093, ,
    Lee, 401-145-SWC, .117, ,
    Lee, TL401-175-SWC, .141, ,
    Lee, 401-175-TC, .141, ,
    Lee, 410-195-SWC, .110, ,
    Lee, 410-210-SWC, .119, ,
    Lee, 429-214-SWC, .111, ,
    Lee, C429-240-SWC, .124, ,
    Lee, 429-240-RF, .124, ,
    Lee, 429-240-2R, .196, ,
    Lee, TL430-240-SWC, .169, ,
    Lee, C430-310-RF, .218, ,
    Lee, 452-160-RF, .090, ,
    Lee, 452-200-SWC, .127, ,
    Lee, 452-200-RF, .140, ,
    Lee, TL452-200-SWC, .127, ,
    Lee, 452-228-1R, .145, ,
    Lee, TL452-230-2R, .189, ,
    Lee, TL452-230-TC, .146, ,
    Lee, 452-252-SWC, .136, ,
    Lee, 452-255-RF, .210, ,
    Lee, C452-300-RF, .233, ,
    Lee, C476-325-RF, .256, ,
    Lee, 476-400-RF, .271, ,
    Lee, C501-440-RF, .296, ,
    Lee, C285-130-R, .305, ,
    Lee, C309-113-F, .199, ,
    Lee, C309-120-R, .163, ,
    Lee, C309-150-F, .264, ,
    Lee, C309-160-R, .252, ,
    Lee, C309-170-F, .268, ,
    Lee, C309-180-R, .317, ,
    Lee, C309-200-R, .352, ,
    Lee, C312-155-2R, .268, ,
    Lee, CTL312-160-2R, .276, ,
    Lee, C312-185-1R, .247, ,
    Lee, C324-175-1R, .216, ,
    Lee, C329-205-1R, .361, ,
    Lee, C338-220-1R, .250, ,
    Lee, 379-250-RF, .250, ,
    Lee, 457-340-F, .211, ,
    Lee, 457-405-F, .225, ,
    Lee, 459-405-HB, .250, ,
    Lee, 457-450-F, .250, ,
    Lee, C457-500-F, .278, ,
    Lee, 459-500-3R, .443, ,
    Lee, 515-450-F, .220, ,
    Lee, 515-500-F, .283, ,

    Now, anyone with Hensley&Gibbs data?
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  7. #7
    Boolit Master WILCO's Avatar
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    Great info here. Thanks to all for posting. Just FYI, the Natchez shooting supply catalog has BC's listed for the LEE molds. I've used that as a reference more than once in the past.
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  8. #8
    Boolit Master
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    Talking

    I have been looking for the B.C. of SAECO moulds. The one I am most interested in is the #315 175 gr TCGC that I shoot.

  9. #9
    Boolit Master
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    Remember that weights of cast bullets vary with weights. BC's also vary with weight . Variation will normally be proportionate witweight increase.

    Also remember than BC varies vith velocity and continues to vary from muzzle to impact. Take all BC's with a cup of salt.

  10. #10
    Boolit Man shootingbuff's Avatar
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    Gracias mi' amigos!

    sb

  11. #11
    Boolit Man shootingbuff's Avatar
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    Quote Originally Posted by BAGTIC View Post
    Remember that weights of cast bullets vary with weights. BC's also vary with weight . Variation will normally be proportionate witweight increase.

    Also remember than BC varies vith velocity and continues to vary from muzzle to impact. Take all BC's with a cup of salt.
    Good point, but for most what is listed should be good/close enough. Even with good data and ballistic programs one needs to verify on the range and the conditions they are planning to shoot in.
    sb

  12. #12
    Boolit Bub
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    Hey all -

    FWIW - can't say how accurate the results this gives, but:

    Precision Ballistic Coefficient Estimator
    http://www.uslink.net/~tom1/calcbc/c...htm#calculator

    Have fun.

    regards,
    Terry

    I will never intentionally shoot your sacred cow.

  13. #13
    In truth --- the only real way to know what the B.C. of YOUR cast boolits and also which B.C. scale best applies to that particular boolit at the velocity range your pushing it --- (yes there are more then one B.C. scale) --- is to to find a good stable accurate load with low deviation on the muzzle velocity --- then move the chrony out to the 50 yard line and take another string --- then out to the 100 yard line and take another string --- and if your a really good shot and brave then do the same out as far as you dare --- then average out those strings and crunch the numbers

    Basically you fiddle with the BC number with the input muzzle velocity until the results match your outputs on an external balistic calc program and there you have your BC --- while doing this and trying to reverse engineer the B.C. from real world data it will become very apparent why there are more then one BC scale

    In fact I have found more then one cast boolit load combo that defies the balistic tables and don't seem to have any normal kind of B.C. scale curve --- in such cases using the mathmatical curve fitting function in a good graphing calculator sometimes works better then any ballistic calculator program when you have the raw data like this to crunch at your finger tips --- then apply the base physics formulas for projectile motion and use the equation that the graphing calculator came up with to build a function to quantify the drag quotient --- that usually puts me dead on way better then any ballistic calc program I've found yet --- so much so that I usually go straight to that and don't even bother with the conventional BC scales unless Im trying to comunicate with someone who only comprehends "BC" (and usually they don't realize there is more then on darn BC scale) and then I have to do things the old way in order to translate into their language because usually all they are going to do is plug it into some generic external balistic calc to know how much hold over to get themselves at least on the board at longer ranges --- especially true in the wheel gun hand cannon world (one of the worlds I live in)

  14. #14
    Boolit Bub
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    True enough, and B.C. also varies w/humidity, elevation & temperature, so even with a given load/gun/shooter combo, it won't be one number all the time.
    But getting on the paper at various ranges is what most folks'd use it for, I 'spect.
    Terry

    I will never intentionally shoot your sacred cow.

  15. #15
    Boolit Master in Heaven's Range

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    This thread looks like a good candidate for stickyizing.

    Regards,

    Stew
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  16. #16
    Boolit Master
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    Figured to add one to this thread. A Lyman mould, that was not in the previous
    list. In fact, it should be arriving this coming week for me.

    This from the most recent Cast Bullet Handbook from Lyman.

    Lyman 515142 515 grain B.C. 0.264

  17. #17
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    This link should work a little better

    http://www.uslink.com/~tom1/calcbc/calcbc.htm

    Quote Originally Posted by pbchunkr View Post
    Hey all -

    FWIW - can't say how accurate the results this gives, but:

    Precision Ballistic Coefficient Estimator
    http://www.uslink.net/~tom1/calcbc/c...htm#calculator

    Have fun.

    regards,

  18. #18
    Boolit Master Wayne S's Avatar
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    Quote Originally Posted by Tom Myers View Post
    This link should work a little better

    http://www.uslink.com/~tom1/calcbc/calcbc.htm
    I can't get it to take some numbers ?? can someone try and see \what Lymans 311365 turns out to be ? with the pointy nose it has to be higher than the 311299
    IHMSA # 566 "time sure flies when you're having FUN"

  19. #19
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    Quote Originally Posted by Wayne S View Post
    I can't get it to take some numbers ?? can someone try and see \what Lymans 311365 turns out to be ? with the pointy nose it has to be higher than the 311299
    If you select the applicable radio buttons near the top of the calculator, the fields below will only accept the values that apply to those selections.

    TommyGirl tells it like it is when it comes to estimating or calculating BCs.

    I don't have either of Lyman's 311299 or 311365 bullets so I scaled up some values from images of the bullets, entered them into the online Precision Ballistics Calculator and imaged the results shown below.

    The calculated value of the 311299 is lower than Lyman's published value but it has been my experience that real world BCs are usually not as high as most published BC values.

    The Calculated value of the 311365 seems quite high and I have not seen a published or measured BC for this bullet. However, the values can offer a means of comparing a bullet BC to a bullet with known BC.

    Hope this helps.











  20. #20
    Boolit Master stubert's Avatar
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    There is a reloading program called Load from a disc, that lists BC's for almost all of the boolits in thier database.( cast and jacket) They also have a printable chart that uses the nose profile to predict it.

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Abbreviations used in Reloading

BP Bronze Point IMR Improved Military Rifle PTD Pointed
BR Bench Rest M Magnum RN Round Nose
BT Boat Tail PL Power-Lokt SP Soft Point
C Compressed Charge PR Primer SPCL Soft Point "Core-Lokt"
HP Hollow Point PSPCL Pointed Soft Point "Core Lokt" C.O.L. Cartridge Overall Length
PSP Pointed Soft Point Spz Spitzer Point SBT Spitzer Boat Tail
LRN Lead Round Nose LWC Lead Wad Cutter LSWC Lead Semi Wad Cutter
GC Gas Check