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Dialing a 243 Win?

 
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  #1  
Old 06-20-2011, 11:07 PM
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Dialing a 243 Win?

Remmington 700 26 inch bull barrel. I've shot about 600 rounds trying to perfect my new rifle. 8 trips out on the chrono and 5 trips to the local bench rest club. I've got 100 gr spbt set to a very consistant 3200 fps IMR 7828 can do 10 shots all within 8 fps spread. So I want to use that number for ballistic calculations.

My question is about how do you measure the targets. Do you measure from center of the hole to the farthest hole center? I was shooting at 200 yards and the center to center is 1.212 inches for 8 shots. Out side edge to outside edge is closer to 1.423 inches. Anyway It is some of the best groups that I have ever shot
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.270 Ackley improved 29 inch 1.250 dia. target barrel 7mm STW 28 inch 1.250 target barrel. I also love my .458 mag for varmints and the biggest game in the world.
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  #2  
Old 06-21-2011, 04:59 AM
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Re: Dialing a 243 Win?

Easiest is to measure outside to out side them subtract the bullet diameter. So 1.423" - .243" = 1.18" group
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  #3  
Old 06-21-2011, 09:13 PM
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Re: Dialing a 243 Win?

If your twist is 1 in 10 inches try Searra .85 HPBT Game Kings or Match Kings and you will probably cut your group size in half.

Ask me how I know.

joseph
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Old 06-22-2011, 08:53 AM
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Re: Dialing a 243 Win?

Quote:
Originally Posted by joseph View Post
If your twist is 1 in 10 inches try Searra .85 HPBT Game Kings or Match Kings and you will probably cut your group size in half.

Ask me how I know.

joseph
1 in 9 1/4
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.270 Ackley improved 29 inch 1.250 dia. target barrel 7mm STW 28 inch 1.250 target barrel. I also love my .458 mag for varmints and the biggest game in the world.
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  #5  
Old 06-22-2011, 03:02 PM
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Re: Dialing a 243 Win?

I suggest you try the Searra .85 HPBT Game Kings or Match Kings. They are extremely accurate. I have killed more than 50 deer at up to 300 yds. A fox at 600 yds. Maybe 1,000 wood chucks with them out to 500 yds.

My Winchester Mod. 70 Varmint manufactured in 1969 with a 24" stock varmint barrel would shoot 1/4" and less 5 shot groups at 100 yds. before I shot out the barrel.

I reloaded using CCI-BR2 primers & IMR-4350 powder.

joseph
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  #6  
Old 06-22-2011, 10:15 PM
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Re: Dialing a 243 Win?

Great info guys.

Sometimes it's easier to first draw a line through what appears to be the center of the hole, then measure from there but normally, I just use my calipers and measure outside to outside and subtract the bullet diameter like midwesthunter said.

I want another .243. My last one locked up and is now a wall hanger...
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  #7  
Old 07-06-2011, 09:56 AM
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Re: Dialing a 243 Win?

Rem 700... great gun. I shoot 70's and 85's both shoot well
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