Heaviest caliber weight for 1:9 1/8 twist and shortest barrel length for 243 win

joe.grey

joe.grey

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Hey guys, once again I require your help in helping me determine :

1- the best caliber weight for a 1:9 1/8 twist ?
2- shortest barrel length for 243 winchester rifle?

Info on rifle:
Remington 700 SPS Varmint, 26" heavy barrel, 1:9 1/8 twist in .243 Winchester caliber

Use: paper and metal targets, tactical competitions (25metres to 1000 metres)

Thank you
 
Whats the twist rate? What do you mean "best caliber weight"? Best bullet weight?
Shortest barrel length? Huh?

If you already have the rifle, why are you asking?
 
Apparently the 105 amax will stabilize in the 9 twist barrels. I haven't personally tried it. As far as barrel length goes thats pretty much up to you.
 
Alpheus said:
Whats the twist rate? What do you mean "best caliber weight"? Best bullet weight?
Shortest barrel length? Huh?

If you already have the rifle, why are you asking?
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"Whats the twist rate?" - Did you even read the post? It says so in the title and in the body of the post: 1:9 1/8 twist
"If you already have the rifle, why are you asking?" - Because the rifle can be modified.
"What do you mean "best caliber weight"?" - grains are used as a unit of measure for both the projectile and powder charge weight...I want to know the maximum grains per projectile I can use with a 1:9 1/8 twist.
 
joe.grey said:
"Whats the twist rate?" - Did you even read the post? It says so in the title and in the body of the post: 1:9 1/8 twist
"If you already have the rifle, why are you asking?" - Because the rifle can be modified.
"What do you mean "best caliber weight"?" - grains are used as a unit of measure for both the projectile and powder charge weight...I want to know the maximum grains per projectile I can use with a 1:9 1/8 twist.
Click to expand...

I see, you mean 1 in 9.125" twist. Using a slash or a colon are both used when describing twist, hence the confusion.

The term is bullet weight. You might get away with 105gr, but it will be marginal. If I were you, I'd go 90-05gr.
Cut the barrel shorter, and your chances with the 105s get slimmer.

http://www.bergerbullets.com/twist-rate-calculator/
 
Depending on what your shooting with it, look into the 87gr vmax. It's what I was shooting out of my factory savage 243 before I re barrelled it to 243AI.
The 87vmax was awesome on yotes and groundhogs. It also shot very well with minimal time spent fine tuning.
 
I have had very good luck runnig the 88 gr Berger hybrids out of mine over Varget. Seems to have had two accuracy nodes as well. One around 35gr and another at 38.7gr. Both shot equally well, but being the misses rifle. She went with reduced recoil at 35 gr.
 
I have the same rifle and I ok results with hornady 105gn hpbts during the summer but since the temperature has gone down I haven't had as good of luck. Very unstable with the lower velocity. When I used the stability calculator online the the 105's were right on the bottom end of stability, around 1.2 at 20*C. I had better results with 100gns last winter.
 
I have the same rifle as you, 95's would not stabilize. 87 Bergers shoot in the low 0.300 moa area. I have them touching lands, which leaves very little in the case mouth. YMMV
 
duncansuds said:
I have had very good luck runnig the 88 gr Berger hybrids out of mine over Varget. Seems to have had two accuracy nodes as well. One around 35gr and another at 38.7gr. Both shot equally well, but being the misses rifle. She went with reduced recoil at 35 gr.
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Thank you. I'll add the 88s to my list of trials.

timmy204 said:
A buddies sps varmint shoots great even out to 1000 yds with berger 95 vld's. Shoots flat too, he only needs about 22 moa to get out to 1000.
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A friend of mine said the exact same thing. 95s are on the trial list as well.

Ed82 said:
I have the same rifle and I ok results with hornady 105gn hpbts during the summer but since the temperature has gone down I haven't had as good of luck. Very unstable with the lower velocity. When I used the stability calculator online the the 105's were right on the bottom end of stability, around 1.2 at 20*C. I had better results with 100gns last winter.
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I've read that 105s are only recommended on a 1:8 twist...my 1:9.125 is too slow

leonard said:
85-100gr should stabilize fine.
I've done so under a heavy load of varget @ 95Gr Noslers.
GL sir.
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Thx mate!

Silvertip13 said:
I have the same rifle as you, 95's would not stabilize. 87 Bergers shoot in the low 0.300 moa area. I have them touching lands, which leaves very little in the case mouth. YMMV
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Hmmm...will have to try quite a few loads
 
I have had extensive experience with the 9.125" twist in Remington 6mm barrels.

They will generally stabilize flat based bullets up to 105 grains just fine.

VLD bullets like the Berger and Lapua match types, you will have to drop back to 90/95 grain bullets to get them to stabilize dependably.

Any bullet design 95 grains or under will work just fine.

Regards, Dave.
 
Before my Stevens 200 got a big fat target barrel I was shooting Berger 90 gr BT Target over H4831 with reasonable results. That 1: 9.25" twist pencil barrel was cut down to 18.5 inches.
 
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