Hi guys,
Just thought id ask guys, what BC are you guys plugging in to your ballistic calculators for the 39SBK. I know that Sierra advertise 0.287 above 3600 ftps, and I know that this is well OTT. I have Chronoed my bullets at various distance and have come up with a BC of 0.251 but im still struggling with windage etc. Its as if I am always underestimating the wind or that the BC of the bullet is more like 0.230.
Any ideas guys or could anyone help please
Thanks guys.
Steve.
.204 Bullet BC
- Darkker
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Re: .204 Bullet BC
That number agrees with Shooter. What I found when things "weren't right" was a DFO problem. Something like height offset, or atmosphere
I'm a firm believer in the theory that if it bleeds, I can kill it.
- 247sniper
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Re: .204 Bullet BC
Darkker wrote:That number agrees with Shooter. What I found when things "weren't right" was a DFO problem. Something like height offset, or atmosphere
Which one mate? What is DFO stand for?
- 247sniper
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Re: .204 Bullet BC
Does nobody shoot .204's long range using ballistic programs?
- 247sniper
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Re: .204 Bullet BC
Anyone?
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Re: .204 Bullet BC
I am also waiting on DFO definition
- RAMOS
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Re: .204 Bullet BC
Try this, acronyms.thefreedictionary.com/DFO . It won't answer your' question but, it might make you chuckle.
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Re: .204 Bullet BC
Dumb F*&#)%! Operator I believe.
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RIP Russ,Blaine, & Darrell!!
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Re: .204 Bullet BC
Been taking mine out to mid ranges, around 600 yards. I use Strelok Pro and 0.242 as my BC. It seems very close on elevation and windage is normally ok but it only take a small gust of wind to completely change such a light bullet. My rifle only has a 20" barrel so my FPS is down to 3435 so that might be why .242 works for me.
How I got .242 was not very scientific I looked up the BC
Between 3400 to 2800 = .255
2800 to 2300 =236
.255 + .236 = 491 .491/2 = .245 less a bit for the slower speed before it hits the target, hence .242
How I got .242 was not very scientific I looked up the BC
Between 3400 to 2800 = .255
2800 to 2300 =236
.255 + .236 = 491 .491/2 = .245 less a bit for the slower speed before it hits the target, hence .242
- Hedge
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Re: .204 Bullet BC
Not on a regular basis. But I have shot mine at 1000 yds, just to see what I could do. Granted, I picked calm days (< 5mph winds). I used Strelok and it got me consistent hits on a standard IPSC target. Had to chuckle at the lack of serious markings on the steel, though. If it weren't for the paint, I wouldn't know there was a hit!247sniper wrote:Does nobody shoot .204's long range using ballistic programs?
Savage 12 FCV .204 Ruger
Viper PST FFP 4-16x50
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Viper PST FFP 4-16x50
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"A fear of weapons is a sign of retarded sexual and emotional maturity" Sigmund Freud.
- 247sniper
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Re: .204 Bullet BC
Does anyone know the G7 BC figure for the 39 SBK?
Steve
Steve