Long Range Hunting Online Magazine 195 grain 7mm Berger - How Much Cartridge Will it Need?
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# 195 grain 7mm Berger - How Much Cartridge Will it Need?

#15
12-11-2013, 10:27 AM
 Platinum Member Join Date: Jan 2011 Location: Tulsa Posts: 2,346
Re: 195 grain 7mm Berger - How Much Cartridge Will it Need?

Santa Clause, the Tooth Fairy, the Easter Bunny, and Berger 195 gr 7mm Bullets.
#16
12-11-2013, 10:34 AM
 Platinum Member Join Date: Oct 2008 Location: Alabama Posts: 10,003
Re: 195 grain 7mm Berger - How Much Cartridge Will it Need?

Quote:
 Originally Posted by Edd Santa Clause, the Tooth Fairy, the Easter Bunny, and Berger 195 gr 7mm Bullets.
Pretty much how I feel about it...
__________________
"I'm just a peckerwood who lives in the hills with too many guns..." - Bob Lee Swagger

"Give me a minute...I'm good. Give me an hour...I'm great. Give me 6 months...And I'm unbeatable." - Col. Hannibal Smith

Quote:
 Originally Posted by WildRose The 284 is to the STW what a tricycle is to a Ninja.
#17
12-11-2013, 10:57 AM
 Silver Member Join Date: Oct 2013 Location: Texas Posts: 107
Re: 195 grain 7mm Berger - How Much Cartridge Will it Need?

I must be looking at something incorrectly on the calculator then?

Twist Rate Stability Calculator

Use this form to determine your gyroscopic stability factor (SG) based on the Miller Twist Rule

Input Parameters
Caliber .284
Bullet Weight 195 Grains
Bullet Length 1.5
Barrel Twist 9 Inches/Turn
Muzzle Velocity 3000
Temperature 59
Altitude 4500 Feet

SG = 2.01

Not saying that you will not need a 8.5 or 8 twist to stabilize, I am just asking.

Is there any reason not to run that fast of a twist rate, i.e. would it make lighter bullets come apart easier at higher MV's due to the increased RPM's leaving the barrel?
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Army Field Artillery
#18
12-11-2013, 11:05 AM
 Platinum Member Join Date: Jan 2011 Location: Tulsa Posts: 2,346
Re: 195 grain 7mm Berger - How Much Cartridge Will it Need?

Quote:
 Originally Posted by joeycoates I must be looking at something incorrectly on the calculator then? Twist Rate Stability Calculator Use this form to determine your gyroscopic stability factor (SG) based on the Miller Twist Rule Input Parameters Caliber .284 Bullet Weight 195 Grains Bullet Length 1.5 Barrel Twist 9 Inches/Turn Muzzle Velocity 3000 Temperature 59 Altitude 4500 Feet SG = 2.01 Not saying that you will not need a 8.5 or 8 twist to stabilize, I am just asking. Is there any reason not to run that fast of a twist rate, i.e. would it make lighter bullets come apart easier at higher MV's due to the increased RPM's leaving the barrel?
In your other post you said any altitude. To me, any altitude would include sea level.
Using 4500 feet will make some difference. The other difference is, you are not using the correct bullet length. The correct length is 1.637".
#19
12-11-2013, 11:50 AM
 Silver Member Join Date: Oct 2013 Location: Texas Posts: 107
Re: 195 grain 7mm Berger - How Much Cartridge Will it Need?

Yea, I had to guess on length as I have not seen the actual length anywhere. I know that it will make a difference.
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Army Field Artillery
#20
06-11-2014, 07:34 PM
 Silver Member Join Date: Feb 2010 Posts: 422
Re: 195 grain 7mm Berger - How Much Cartridge Will it Need?

You may want to give the 190 gr Matrix a try.
#21
06-12-2014, 05:55 AM
 Platinum Member Join Date: Apr 2012 Location: California Central Coast Posts: 3,564
Re: 195 grain 7mm Berger - How Much Cartridge Will it Need?

7mm/26 Nosler!

Well that's my story and I'm sticking to it.

IMHO a STW, WSM, Dakota, Allen, 7mm/375 Ruger or a 284/7mm/26 Nosler is probably where you want to go.

I don't think a 284 Win or AI or a 280 Rem or AI will hunt the way you would want.
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Fred Seaman - NRA Life Member
"Quit worrying about the little things, good luck and god speed"

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