twist rates

andyone

this might sound like a stupid question.... but after reading this it got me thinking...

Note about Bullet Twist: Bergers recommended bullet/
barrel twist rates are listed next to the bullets.
Where Twist is listed, it refers to twist of barrel or
faster (example 1 in 19” = 1 in 19” or faster)

the question i have is a 1:10 faster than a 1:9 or is it slower...

stick shooter

andyone wrote: »

this might sound like a stupid question.... but after reading this it got me thinking...

Note about Bullet Twist: Bergers recommended bullet/
barrel twist rates are listed next to the bullets.
Where Twist is listed, it refers to twist of barrel or
faster (example 1 in 19” = 1 in 19” or faster)

the question i have is a 1:10 faster than a 1:9 or is it slower...

A 1:10 means one full rotation in ten inch of barrel .And yes for say a 1:9 is faster than a 1:10 or lower

andyone

stick shooter wrote: »

A 1:10 means one full rotation in ten inch of barrel .And yes for say a 1:10 is faster than a 1:9 or lower

sorry stick .. i'm still unsure..... if as you say a 1:10 is one full rotation in ten inchs of barrel length..... surely if it rotated an inch sooner in a 1:9 the twist rate would be faster than the 1:10:confused

dev110

The 1:9 would be faster than a 1:10

ejg

RPM of the bullet out of a 1 in 9" will be higher than out of a 1 in 10" meaning "faster" (will stabalise a heavier and longer bullet better)
Highest accuracy is often achieved when twist is not too fast for bullet used.
edi

stick shooter

andyone wrote: »

sorry stick .. i'm still unsure..... if as you say a 1:10 is one full rotation in ten inchs of barrel length..... surely if it rotated an inch sooner in a 1:9 the twist rate would be faster than the 1:10:confused

Ill try explain it a bit better ,i see in other thread you sold your 223 .say i have a 1:12 twist 223 i can run up to say 80gr but if i have a 1:9 223 i can run up to 60gr . hence the phrase faster twist

andyone

thanks lads...

thats that explained..... now i can bull**** my way through another conversation...:D:D

Cass

stick shooter wrote: »

........say i have a 1:12 twist 223 i can run up to say 80gr but if i have a 1:9 223 i can run up to 60gr . hence the phrase faster twist

You're getting it backwards.

The faster the twist rate the higher the grainage bullet you can use. So for a 1:12 twist the best bullet to use would be between 40 - 55gr. For a 1:9 twist the best bullet to use would be between 65-75gr.

andyone

Ezridax wrote: »

You're getting it backwards.

The faster the twist rate the higher the grainage bullet you can use. So for a 1:12 twist the best bullet to use would be between 40 - 55gr. For a 1:9 twist the best bullet to use would be between 65-75gr.

yes but a lighter grain should work also..... ie what the Berger people said

dev110

andyone wrote: »

yes but a lighter grain should work also..... ie what the Berger people said

Yes in the 1:9 cz it will shoot 40gr up to 75gr

stick shooter

Ezridax wrote: »

You're getting it backwards.

The faster the twist rate the higher the grainage bullet you can use. So for a 1:12 twist the best bullet to use would be between 40 - 55gr. For a 1:9 twist the best bullet to use would be between 65-75gr.

Do you try correct every one or is it just me lol:D . your like my shadow i am starting to feel the love from you

Cass

You can use any bullet that is the proper calibre for your rifle. The results, as in accuracy, will depend on which bullet best suits your rifle's twist rate.

Also twist rates do not always dictate the correct bullet. My Savage 1:12 twist will shoot 155grs perfectly. It will also shoot 190gr as well. Technically it "shouldn't". My old CZ was 1:9 meaning 65+gr should work best. Yet 40, and 50gr bullets worked perfectly in it.

Its a rule of thumb not a guarantee.

Cass

stick shooter wrote: »

Do you try correct every one or is it just me lol:D

Paranoid much?

your like my shadow i am starting to feel the love from you

Tin foil hat man, seriously.

virminhunter

Ezridax wrote: »

You can use any bullet that is the proper calibre for your rifle. The results, as in accuracy, will depend on which bullet best suits your rifle's twist rate.

Also twist rates do not always dictate the correct bullet. My Savage 1:12 twist will shoot 155grs perfectly. It will also shoot 190gr as well. Technically it "shouldn't". My old CZ was 1:9 meaning 65+gr should work best. Yet 40, and 50gr bullets worked perfectly in it.

Its a rule of thumb not a guarantee.

your right, I got a box of 75grain hornady match for my cz 1:9, 2inch group at 100yards:mad: on the other hand its a tackdriver with 40grain ammo. I'm not sold on 1:9 twists in .223 stabalising 75grain bullets.

andyone

stick shooter wrote: »

Ill try explain it a bit better ,i see in other thread you sold your 223 .say i have a 1:12 twist 223 i can run up to say 80gr but if i have a 1:9 223 i can run up to 60gr . hence the phrase faster twist

maybe you should edit this one aswell... my cz had a 1:9 twist and loved the 75gr's from hornady.... and i thought the 1:12's were good for 55gr's:cool:

vermin... i was geting sub moa at 200yds with the 75gr's

stick shooter

Ezridax wrote: »

Paranoid much?



Tin foil man, seriously.

I can always rely on you to correct me
The best way of confusing a kerry man is putting two shovels against a wall and telling him to take his pick .Go figure lol:D:D:D

virminhunter

I won't edit it I shot them off a bench in perfect conditions, and shot a group afterwards with 40gr. vmax.

andyone

virminhunter wrote: »

I won't edit it I shot them off a bench in perfect conditions, and shot a group afterwards with 40gr. vmax.

the "edit it" wasn't for you vermin... re read my post it was for stickshooter.... as he already edited a post ealier in the thread..

tis wierd she wouldn't shoot them.... i was in a ditch in not ideal conditions..... i'd say if she was on the bench with ideal conditions... i migt have been able to shave another half an inch of it..

https://us.v-cdn.net/6034073/uploads/attachments/222792/117566.jpg

virminhunter

andyone wrote: »

the "edit it" wasn't for you vermin... re read my post it was for stickshooter.... as he already edited a post ealier in the thread..

tis wierd she wouldn't shoot them.... i was in a ditch in not ideal conditions..... i'd say if she was on the bench with ideal conditions... i migt have been able to shave another half an inch of it..

yeah I only copped the edit thing afterwards, I dunno then I can't figure it, nothing wrong with me or the rifle because it'll group fine with the lighter stuff, I'll try'em again sometime when I have a spare €30.

andyone

i was confused with a simple statement... now i'm totally ******..

i think you have gone above and beyond my initial question... and i'm sure berger wasn't talking about iams.... but it does make for interesting reading..... thank you... next you will be telling me about optimal barrel lengths.. and powder burn....

andyone

virminhunter wrote: »

yeah I only copped the edit thing afterwards, I dunno then I can't figure it, nothing wrong with me or the rifle because it'll group fine with the lighter stuff, I'll try'em again sometime when I have a spare €30.

ya i know that feeling,,,, i went back to Fiochi 55gr's... still killed the rabbits;);)

FISMA

andyone wrote: »

i was confused with a simple statement... now i'm totally ******..

i think you have gone above and beyond my initial question... and i'm sure berger wasn't talking about iams.... but it does make for interesting reading..... thank you... next you will be telling me about optimal barrel lengths.. and powder burn....

Post removed.

I'll try not to tell you any more.

Slan.

andyone

FISMA wrote: »

Post removed.

I'll try not to tell you any more.

Slan.

i was being serious.. i did find it interesting

dev110

FISMA wrote: »

Post removed.

I'll try not to tell you any more.

Slan.

Why did you remove it?
I found it interesting.
A barrel of 24" with a 1:9 twist say shooting a 55gr say with a muzzle velocity of 3200 fps
And a 26" barrel with a 1:12 twist shooting a 55gr with a muzzle velocity of 3200 fps.

It shows a long barrel with a slow twist will have the same muzzle velocity of a short barrel with a fast twist.

What you were saying is we needed more information like the length of the barrel. Yes?