List of BC for cast bullets
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Boolit and Pellet Casting
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List of BC for cast bullets
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Topic: List of BC for cast bullets (Read 632 times))
Hobbyman2007
N.U.A.H. Expert
GTA Senior Contributor
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Real Name: Denis
List of BC for cast bullets
«
on:
December 02, 2018, 09:30:30 AM »
I found a list on castboolit gunloads .com and thought I’d share . It a pretty extensive list and I’m sure it would help give a ball park for anyone that use ballistic apps like ChairGun or StrelokPro .
http://castboolits.gunloads.com/showthread.php?94638-Cast-Bullet-Ballistic-Coefficent-Table
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Dowling,Ontario, Canada
I like air guns ,and they like me
rsterne
Member 2000+fps Club
Bob and Lloyd
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Posts: 26957
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Real Name: Bob
Re: List of BC for cast bullets
«
Reply #1 on:
December 02, 2018, 01:08:16 PM »
I notice the 2nd chart on the Lyman bullets has three BCs listed, dependant on velocity.... Unfortunately, they don't do subsonic....
Bob
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Coalmont, BC, Canada
🇺🇦
Dominion Marksman Silver Shield - 5890 x 6000 in 1976, and downhill ever since! 🇺🇦
Airsenal:
1750 CO2 Carbine, .177 Uber-Pumper, .22 Uber-Carbine, .25 Discovery, 2260 PCP 8-shot Carbine, 2260 HPA (37 FPE), 2560 HPA (52 FPE), XS-60c HPA in .30 cal (90 FPE), .22 cal QB79 HPA, Disco Doubles in .22, .25 & .30 cal, "Hayabusa" Custom PCP Project (Mk.I is .22 & .25 cal regulated; Mk.II is .224, .257, 7mm, .308 & .357; Mk.III is .410 shotgun and .458 cal), .257 "Monocoque" Benchrest PCP, .172/6mm Regulated PCP and .224/.257 Unregulated, Three regulated BRods in .25 cal (70 FPE), .30 cal (100 FPE) & .35 cal (145 FPE), .257 Condor (180 FPE).
Hobbyman2007
N.U.A.H. Expert
GTA Senior Contributor
Posts: 3011
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Real Name: Denis
Re: List of BC for cast bullets
«
Reply #2 on:
December 02, 2018, 01:29:48 PM »
Looking at the trend line for velocities and BC it would appear the 257420 as an example would have a BC closer to .2 than the .12 I’ve been using . Good catch Bob . If I had the confidence to shoot over my chrony at 100 yards I’d confirm . But truth be told I’m not that great of a shot .
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Dowling,Ontario, Canada
I like air guns ,and they like me
rsterne
Member 2000+fps Club
Bob and Lloyd
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Real Name: Bob
Re: List of BC for cast bullets
«
Reply #3 on:
December 02, 2018, 01:41:50 PM »
Actually, I think dyotat100 says that the subsonic BC for the 257420 is about 0.14.... The SD is only 0.151, and it is unusual for a flat base bullet to have a FF less than 1.... so the subsonic BC is usually less than the SD....
Nothing is linear when you go through the transonic range....
Bob
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Coalmont, BC, Canada
🇺🇦
Dominion Marksman Silver Shield - 5890 x 6000 in 1976, and downhill ever since! 🇺🇦
Airsenal:
1750 CO2 Carbine, .177 Uber-Pumper, .22 Uber-Carbine, .25 Discovery, 2260 PCP 8-shot Carbine, 2260 HPA (37 FPE), 2560 HPA (52 FPE), XS-60c HPA in .30 cal (90 FPE), .22 cal QB79 HPA, Disco Doubles in .22, .25 & .30 cal, "Hayabusa" Custom PCP Project (Mk.I is .22 & .25 cal regulated; Mk.II is .224, .257, 7mm, .308 & .357; Mk.III is .410 shotgun and .458 cal), .257 "Monocoque" Benchrest PCP, .172/6mm Regulated PCP and .224/.257 Unregulated, Three regulated BRods in .25 cal (70 FPE), .30 cal (100 FPE) & .35 cal (145 FPE), .257 Condor (180 FPE).
Hobbyman2007
N.U.A.H. Expert
GTA Senior Contributor
Posts: 3011
yes
Real Name: Denis
Re: List of BC for cast bullets
«
Reply #4 on:
December 02, 2018, 01:54:25 PM »
I would imagine the GC basewiuld help a little ?
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Dowling,Ontario, Canada
I like air guns ,and they like me
rsterne
Member 2000+fps Club
Bob and Lloyd
GTA Senior Contributor
Posts: 26957
GTA Forums Person of the Year 2017
Real Name: Bob
Re: List of BC for cast bullets
«
Reply #5 on:
December 02, 2018, 10:48:19 PM »
I think the 0.14 is for the GC 257420....
Bob
Logged
Coalmont, BC, Canada
🇺🇦
Dominion Marksman Silver Shield - 5890 x 6000 in 1976, and downhill ever since! 🇺🇦
Airsenal:
1750 CO2 Carbine, .177 Uber-Pumper, .22 Uber-Carbine, .25 Discovery, 2260 PCP 8-shot Carbine, 2260 HPA (37 FPE), 2560 HPA (52 FPE), XS-60c HPA in .30 cal (90 FPE), .22 cal QB79 HPA, Disco Doubles in .22, .25 & .30 cal, "Hayabusa" Custom PCP Project (Mk.I is .22 & .25 cal regulated; Mk.II is .224, .257, 7mm, .308 & .357; Mk.III is .410 shotgun and .458 cal), .257 "Monocoque" Benchrest PCP, .172/6mm Regulated PCP and .224/.257 Unregulated, Three regulated BRods in .25 cal (70 FPE), .30 cal (100 FPE) & .35 cal (145 FPE), .257 Condor (180 FPE).
K.O.
Eternally Tinkering
GTA Senior Contributor
Posts: 7111
yes
Real Name: Kirby
Re: List of BC for cast bullets
«
Reply #6 on:
December 03, 2018, 02:22:07 AM »
Can use Chaigun for a rough estimate.... has a b.c. from trajectory widget...
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The Great Northwest, United States, Washington
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All Springer/NP/PCP Air Gun Discussion General
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List of BC for cast bullets