yew tree 6mm
- Thread starter jtl
- Start date
they do two different bullets, one of which is 1 in 8 or faster
- Yew Tree Fieldsports TLR 6mm .243” Bullets 80.1grains non toxic hunting bullets in 6mm .243” Tipped Long Range Bullet.
Note: These bullets do require a 8” twist or faster.
Manufactured to exceptional standards in Wiltshire, United Kingdom.
the other, does not state it needs a certain twist rate.
Yew Tree Fieldsports 6mm .243” Bullets 80.5grains non-toxic hunting bullets in 6mm .243”.
1 is tipped, the other not
- Yew Tree Fieldsports TLR 6mm .243” Bullets 80.1grains non toxic hunting bullets in 6mm .243” Tipped Long Range Bullet.
Note: These bullets do require a 8” twist or faster.
Manufactured to exceptional standards in Wiltshire, United Kingdom.
the other, does not state it needs a certain twist rate.
Yew Tree Fieldsports 6mm .243” Bullets 80.5grains non-toxic hunting bullets in 6mm .243”.
1 is tipped, the other not
To stabilise in flight, ie fly straight and hit the target pointy end first, not sideways, you need to provide a measure of centripetal force which is applied by spinning the bullet as it travels up the barrel.
The speed that the bullet spins is determined by the velocity and the number of twists in the rifling.
The amount of force required is proportional to length, ie the longer the bullet the more force/faster the rotational speed is required for stability.
Look up Don Millers twist rule on the internet.
Monolithic bullets use a less dense material than std cup and (lead) core bullets do, so they are longer if the wieght is equal.
Length is the key here.
100gr Lead bullets are about the same length as 75gr non-lead bullets (that is a bit of a generic statement) - so if you have a 1:10 twist you are good to go
If you have a 1:8 twist barrel then you can stabilise a heavier bullet as the rotational speed is increased (along with all the forces needed to keep the bullet on the straight and narrow)...
Yew Tree Fieldsports like FOX (and other manufacturers) have used Millers rule, along with (i'm sure) extensive testing to detremine the required rotational speed to provide optimal flight stability characteristics.
You can't beat physics.
@jtl your 1:10 rifled barrel will 'most likely' not stabilise an 80.1gr Yew Tree bullet.
It may stabilise other manufacturers bullets of that weight as they are made shorter (ie HPFB)
Think length not weight.
The speed that the bullet spins is determined by the velocity and the number of twists in the rifling.
The amount of force required is proportional to length, ie the longer the bullet the more force/faster the rotational speed is required for stability.
Look up Don Millers twist rule on the internet.
Monolithic bullets use a less dense material than std cup and (lead) core bullets do, so they are longer if the wieght is equal.
Length is the key here.
100gr Lead bullets are about the same length as 75gr non-lead bullets (that is a bit of a generic statement) - so if you have a 1:10 twist you are good to go
If you have a 1:8 twist barrel then you can stabilise a heavier bullet as the rotational speed is increased (along with all the forces needed to keep the bullet on the straight and narrow)...
Yew Tree Fieldsports like FOX (and other manufacturers) have used Millers rule, along with (i'm sure) extensive testing to detremine the required rotational speed to provide optimal flight stability characteristics.
You can't beat physics.
@jtl your 1:10 rifled barrel will 'most likely' not stabilise an 80.1gr Yew Tree bullet.
It may stabilise other manufacturers bullets of that weight as they are made shorter (ie HPFB)
Think length not weight.
Hillcrawler
Active Member
Hey @xavierdoc, just wondering what kind of drop you get with your 80.5grn bullet from the .243?
Is it realistic to take Roe & Fallow out to 200 - 250m?
Is it realistic to take Roe & Fallow out to 200 - 250m?
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