Twist help

[Coldfinger]

I'm trying to figure out ideal twist rate. I'm looking to build a 6br lightweight. I want to shoot Berger 65 or 67 grain column bullets but be able to jump up to 75 grain. It's intended for coyote and eastern whitetail deer, 0-400 yards. I had a Montana 99 6xc with a 10 twist and it shot everything from 60-105 beautifully. Kreiger rep says I want a 13.5 twist so I'm getting confused. I just want it done right in one shot! Thanks for any input!

 

[Justice1327]

1:10

 

[RockyMtnMT]

Ask Berger what is the fastest twist that your chosen bullet will handle. 13.5" sounds like a handicap to me. I'm thinking 9".

 

[Coyote Shadow Tracker]

I'm trying to figure out ideal twist rate. I'm looking to build a 6br lightweight. I want to shoot Berger 65 or 67 grain column bullets but be able to jump up to 75 grain. It's intended for coyote and eastern whitetail deer, 0-400 yards. I had a Montana 99 6xc with a 10 twist and it shot everything from 60-105 beautifully. Kreiger rep says I want a 13.5 twist so I'm getting confused. I just want it done right in one shot! Thanks for any input!

Personally would go with the fastest twist that a 65-75gr bullet can handle. But still be able to go up to 100+ gr.
Why not just stay with a heavier bullet that will buck the wind better and longer range. That 6BR is awesome with 105gr with a 1:7.5. Just look at all the PRS shooters and most use a 6BR with a 105gr. That should tell you something.
Our .243 with a 1:10 shooting 85-100gr is awesome on deer.

 

[BEEMAN]

I built a 22" long barrel 6 dasher with a 1-7" twist. I wanted to keep my options open for some of the 90-100 gr monos. Shoots the 105 Berger and 103 eldx very good as well.

 

[Coldfinger]

Personally would go with the fastest twist that a 65-75gr bullet can handle. But still be able to go up to 100+ gr.
Why not just stay with a heavier bullet that will buck the wind better and longer range. That 6BR is awesome with 105gr with a 1:7.5. Just look at all the PRS shooters and most use a 6BR with a 105gr. That should tell you something.
Our .243 with a 1:10 shooting 85-100gr is awesome on deer.

Guess I'm just stubborn after having that 6xc with 10 twist. One of those man I wish I would have kept that deals. It's almost impossible to shoot beyond 300 yards in my area so wind isn't too much of a concern to me I'm always chasing speed tho and thinking of lighter bullet=faster powders LT32

 

[can1010]

my 243 is 9.25 twist and the Berger 68gr fb. have no issues with bullets coming apart even above 3500fps. so don't worry about a faster twist. If i was going to stick to cup and core a 10 twist is all you need, if monos or heavies are in the 105-115 class then 7.5 would be a better choice.

 

[Coldfinger]

I built a 22" long barrel 6 dasher with a 1-7" twist. I wanted to keep my options open for some of the 90-100 gr monos. Shoots the 105 Berger and 103 eldx very good as well.

I was thinking of 22" max length

 

[Mikecr]

You already answered your question: The 10tw is right for you.
Barrel length, and MV, makes no difference to this.

 

[Coyote Shadow Tracker]

Use this as a guide

Twist Rate Stability Calculator

Our newly updated Twist Rate Stability Calculator not only tells you what your SG is, but it also lets you know if you are reaching your optimized BC.

bergerbullets.com

 

[338 dude]

I'm trying to figure out ideal twist rate. I'm looking to build a 6br lightweight. I want to shoot Berger 65 or 67 grain column bullets but be able to jump up to 75 grain. It's intended for coyote and eastern whitetail deer, 0-400 yards. I had a Montana 99 6xc with a 10 twist and it shot everything from 60-105 beautifully. Kreiger rep says I want a 13.5 twist so I'm getting confused. I just want it done right in one shot! Thanks for any input!

 

[338 dude]