Is a 8.5 twist too fast for 140-168' VLD in 7mm?
- Thread starter LEOHUNTER
- Start date
Re: 1-8.5 twist too fast for 140-168's ?
TTT
TTT
Re: 1-8.5 twist too fast for 140-168's ?
You should try this post in the Reloading Section.... I have a 1:8tw on my .284 Win, and fire 175gr SMK's and 180SMK's mostly. I do shoot 162gr A-Max,and the bughole....
You should try this post in the Reloading Section.... I have a 1:8tw on my .284 Win, and fire 175gr SMK's and 180SMK's mostly. I do shoot 162gr A-Max,and the bughole....
Re: 1-8.5 twist too fast for 140-168's ?
...thanks Hugo
...thanks Hugo
Re: 1-8.5 twist too fast for 140-168's ?
I think you should be fine. I shoot a 1-8.5 on my 708 and shoot the 162 amaxs great out of it. I am wanting to try a few 140gr hunting bullets for it for hog hunting but I don't see the twist being an issue.
I think you should be fine. I shoot a 1-8.5 on my 708 and shoot the 162 amaxs great out of it. I am wanting to try a few 140gr hunting bullets for it for hog hunting but I don't see the twist being an issue.
Re: 1-8.5 twist too fast for 140-168's ?
"Too fast" of a twist is much less of a problem than too slow.
"Too fast" of a twist is much less of a problem than too slow.
Re: 1-8.5 twist too fast for 140-168's ?
Go check out JBM ballistics website they have a free stability calulator where you put in the bullet length, weight, expected velocity, and twist and it will give you a stability estimation.
Go check out JBM ballistics website they have a free stability calulator where you put in the bullet length, weight, expected velocity, and twist and it will give you a stability estimation.
Re: 1-8.5 twist too fast for 140-168's ?
No it isn't too fast of twist for 7mm I those weights. That is what I have and those weights have shot fine
No it isn't too fast of twist for 7mm I those weights. That is what I have and those weights have shot fine
Re: 1-8.5 twist too fast for 140-168's ?
Not a problem.
There's no such thing as 'too fast a twist' (within reason) anyway: A bullet is either stable; or it isn't.
At 8.5 they should be stable. I have an 8.9 and an 8.7, and they stabilize the 180s just fine, even in very cold weather.
Not a problem.
There's no such thing as 'too fast a twist' (within reason) anyway: A bullet is either stable; or it isn't.
At 8.5 they should be stable. I have an 8.9 and an 8.7, and they stabilize the 180s just fine, even in very cold weather.
Re: 1-8.5 twist too fast for 140-168's ?
"At 8.5 they should be stable. I have an 8.9 and an 8.7, and they stabilize the 180s just fine, even in very cold weather."
does that mean the colder it is the faster those bulelts need to spin to stabilize?
is it the opposite for warmer weather, warmer it get the slower they need to spin?
Thanks for the help.
"At 8.5 they should be stable. I have an 8.9 and an 8.7, and they stabilize the 180s just fine, even in very cold weather."
does that mean the colder it is the faster those bulelts need to spin to stabilize?
is it the opposite for warmer weather, warmer it get the slower they need to spin?
Thanks for the help.
Re: 1-8.5 twist too fast for 140-168's ?
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: LEOHUNTER</div><div class="ubbcode-body">"At 8.5 they should be stable. I have an 8.9 and an 8.7, and they stabilize the 180s just fine, even in very cold weather."
does that mean the colder it is the faster those bulelts need to spin to stabilize?
is it the opposite for warmer weather, warmer it get the slower they need to spin?
Thanks for the help.
</div></div>
Exactly. Also, higher altitudes require less spin due to the lower air density. JBM's stability calculator is fantastic when deciding on a twist rate.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: LEOHUNTER</div><div class="ubbcode-body">"At 8.5 they should be stable. I have an 8.9 and an 8.7, and they stabilize the 180s just fine, even in very cold weather."
does that mean the colder it is the faster those bulelts need to spin to stabilize?
is it the opposite for warmer weather, warmer it get the slower they need to spin?
Thanks for the help.
</div></div>
Exactly. Also, higher altitudes require less spin due to the lower air density. JBM's stability calculator is fantastic when deciding on a twist rate.
