twist rate vs bullet weight

Bananatole

Bananatole

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I have just go into reloading and I am confused on this point. My gun has a 1:10 twist and loves 180 grain federal power shok rounds. I was wondering if the 180 gr rounds are optimal. I like them since i get good accuracy and they kill moose well.

So can someone recommend me a bullet to use for hunting rounds that i will be loading. And also how the twist affects the accuracy.

My gun is a ruger scout.
 
with a 1:10 is near perfect for 180gn so if thy work use them!

twist rate in itself doesnt effect accuracy, using the incorrect twist rate for bullet LENGTH does! so for example, in say a .223 a 1:12 wont shoot the 70+gn bullets youd need a 1:8 or faster (some fast 1:9 would work)

also whats caliber are you loading?
 
its 308. I am asking because i had poor results loading 165 gr sst hornady bullets. It was my first batch of bullets and they grouped but not like the factory federal power shock ones.

I think ill stick with a 180 gr. Can you explain this length of bullet thing? if the twist is faster (is 1:10 slower than 1:20)? the bullet will spin too much creating poor results?

thanks a bunch
 
rate of twist is how many inches traveled the bullet spins ones, so in a 1:10 every 10" of forward travel, the bullet spins 360* so a 1:10 is faster then a 1:12. if the twiwst rate is to slow for a given bullet length, its not spinning fast enough and will tumble. (think of throwing a foot ball - no spiral it just tumbles) and that will give poor accuracy. I say bullet length not weight as a flat base 60gn in 22cal, is obviously shorter then a boat tail of the same weight, so a rifle may shoot the flat base bot no the BT despite being the same weight

are you shooting a stock barrel Remington by chance? they are throated very long, and the jump from bullet to lands may be to big for a 165 to shoot accurately.
 
I am asking because i had poor results loading 165 gr sst hornady bullets. It was my first batch of bullets and they grouped but not like the factory federal power shock ones.
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How many different powders did you try? How many powder charges? How many different distances to the lands? As well, a gun might shoot one 165gr bullet much more accurately than another 165gr bullet, so one bullet isn't a fair test of how a given bullet weight will shoot in a particular rifle.
 
It's a ruger scout with an 18 inch, 1:10 twist. Thanks for the info :). So my bullets will spin about 1.8 times before existing. Ii think I will try some 175 gr bullets for a some better velocities while retaing the killing power.

Thanks man. This info cleared a lot up. So I'm thinking my gun loves the 180s and I've had great results on game with them.
 
stubblejumper said:
How many different powders did you try? How many powder charges? How many different distances to the lands? As well, a gun might shoot one 165gr bullet much more accurately than another 165gr bullet, so one bullet isn't a fair test of how a given bullet weight will shoot in a particular rifle.
Click to expand...

First try reloading. I didn't expec much. I was happy they all went bang. I am just used to 180 grains and the produced good results with factory ammo. I was also curious if a 180 grain bullet was ideal for a 1:10 twist but now I know not all 180 gr are the same length
 
First try reloading. I didn't expec much. I was happy they all went bang. I am just used to 180 grains and the produced good results with factory ammo. I was also curious if a 180 grain bullet was ideal for a 1:10 twist but now I know not all 180 gr are the same length
Click to expand...

Just pointing out that it usually takes some trial and error to find out which loads a particular firearm prefers. Assuming that your gun prefers 180gr bullets over 165gr bullets based on the extremely limited testing that you have done, is like saying that your rifle prefers factory loads over handloads.
 
Your rifle will shoot 150 to 200 gr bullets just fine. Twist will have nothing to do with the different results you get. In my opinion 180 gr is an excellent all round hunting bullet for your rifle.

Find a load that gets good groups and stick with it.
 
thanks guys. I know i need to do more testing but if theres info out there that will save me a pound or two of powder and a couple boxes of bullets ill be happy taking that info.
 
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