243 win 1-10 twist

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1887

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I have a model 7 Remington with a Bevin King 1-10 barrel on it its glass bedded ex ex made to shoot. what is the biggest bullet I could shoot in it and whats a good load for it. looking for long range accuracy. thanks for your help looking for guys that have shot what hey are going to say lol thanks for your help
 
1-10 twist 243 will stabilize a 90 gn flat base bullet or an 85 gn boattail..........it may work with heavier bullets, but it's iffy and long range isn't likely going to hold it's stability. If you wanted a long range accurate 243, you should have gone with a 1-9 or 1-8.5 twist to use the 105 and 115 gn VLD bullets. If you chamber it out to 6-284 you will be able to shoot 100 grn bullets with good stability and possibly even 105 VLDs
 
c-fbmi said:
1-10 twist 243 will stabilize a 90 gn flat base bullet or an 85 gn boattail..........it may work with heavier bullets, but it's iffy and long range isn't likely going to hold it's stability. If you wanted a long range accurate 243, you should have gone with a 1-9 or 1-8.5 twist to use the 105 and 115 gn VLD bullets. If you chamber it out to 6-284 you will be able to shoot 100 grn bullets with good stability and possibly even 105 VLDs
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gun came with a 1-10 twist and it shoot dime size group at 100 yards with federal ammo I got at can tire when I tested it out before I got it. how can you not buy a 243 like that lol
 
Hornady says 1 in 9 twist for 105gr amax and berger says 1 in 8 for 105/8 and 1 in 7 for 115's. So with a 10 twist unless you can push them extremely fast I don't think they will stabilize for you.
 
My Wby VGII has a 1:10 twist.

It will shoot 100 grain Fed soft points almost on top of each other, but feed it some "very long" 95 grain Scirocco's or 90 grain Accubond and they start to keyhole.

With that twist in "my rifle" it's not so much the weight as the length of the bullet - it also shoots poorly with the "longer" mono's regardless of weight, compared to the shorter cup/core stuff.

Mine is "most accurate" with just about anything "80 grain", but 85/87 grains is still very much "sub-moa". If I want to shoot heavier I break out my 7.08 :)
 
I used to shoot berger 105 gr vld's out of my 1 in 10 twist weatherby vanguard . They shot very good out to 600 yards but no so good after that. I am not sure what happened after 600 it could have bin myself that was the problem also as I was just starting out long range shooting.I would say try them , they might suprize you.
 
I have a kimber Montana with 1 - 10 twist 22" and it is very accurate with 90gr Berger and 90gr lapua scenars out to 550 yds. I just started to try it at 1000yds and it looked promising but I have to make some changes to my scope mounts before I continue at 1000yds.
 
Stability is a function of bullet length and bullet RPM. RPM depends on twist and velocity.

My notes show my 1:10 worked with the 105 VLD BUT I now notice it was a 30" barrel with a long throat and two scoops of powder...
 
thanks guys do you have a load to go with those 90gr and up loads that you have tried or like to use now. this would just give me a starting point thanks
 
thanks I will give it a try. when I go to GP this week end I will see if I can find some. then give it a try with the others I have at home. that is when I get home from work in DEc lol
 
I'm in the process now of working up some long distance precision loads for my Tikka T3 243 with the same 1:10 twist. As others have posted it looks like the common maximum is around 90-105 grains depending on bullet style/length, barrel length and velocity. The safe recommendations appear to be at 95 and below. I'm starting out with Berger 87gr VLD hunting with H4350 as the powder. I'll be starting around 40 grains up to wherever I see pressure signs and or accuracy deterioration. I was also working up some hunting loads with Nosler 85 gr partitions and am getting flattened primers at 41 grains of 4350 so am dropping down in 1/2 grain increments until I hit an accuracy node.

I started with the berger 87 vld based on recommendations and availability. If the 87s can't get me reliably to 800 meters then I'll start trying the heavier bullets like the 90 grain lapua scenars, 95 grain sierra match kings and now, based on ganderite's suggestion, the 105 vlds. The 87 should get out to 600m without issue.
 
1887 said:
I have a model 7 Remington with a Bevin King 1-10 barrel on it its glass bedded ex ex made to shoot. what is the biggest bullet I could shoot in it and whats a good load for it. looking for long range accuracy. thanks for your help looking for guys that have shot what hey are going to say lol thanks for your help
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The 90gr lapua scenar is a good one, high BC shoot lights out and has worked in a few 1-10" 243s. H-4350, H-4831 or reloaded 17 would be good places to start.
 
Berger has recently revised their twist rate calculator. You can play around with that to see what you can get away with. You ideally want a stability factor of 1.5, and the standard 90 grain boat tail looks like it would come close to that. The very minimum is a stability factor of 1.0, and with a 105 VLD you are likely getting close to that. The BC is being compromised though and it will drop more than the BC indicates. Don't forget to put in your estimated muzzle velocity with the bullet you select, and your elevation. It makes a difference!
 
thanks guys for all the help going to try and stay at around 90 with a few different once to see what works and how good they will shoot. I still have my 300gr 338 for long shoots
Thanks again if there are more keep them coming
 
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