1-7 twist too much ????

[Freedom2live]

Hello there folks, my question is am getting a new custom barrel for my ruger m77 243.. I am shooting 105 bergers and A-max.. I changed my mind for 1-8 to 1-7, I think it would stabilize that bullet better than 1-8. I dont think I am over revving that round. ... what you folks think ???

 

[J E Custom]

Hello there folks, my question is am getting a new custom barrel for my ruger m77 243.. I am shooting 105 bergers and A-max.. I changed my mind for 1-8 to 1-7, I think it would stabilize that bullet better than 1-8. I dont think I am over revving that round. ... what you folks think ???

In my opinion a 1 in 8 or 1 in 9 would be better.

The really fast twist barrels are hard on bullets (They have to start very fast and can engrave
poorly). if you want to end up with a very fast twist rate you might look into a gain twist barrel.

For accuracy most bench rest shooters go with a slower twist to get cleaner engraving of the bullet.

If you were shooting something very slow like a subsonic the 1 in 7 would work.

Most of the 223 rem shooters tried the 1 in 7 and even the 1 in 6 and went back to 1 in 8 for the best accuracy.

Just my opinion

J E CUSTOM

 

[Freedom2live]

Grain twist barrel, whats that ?

 

[Freedom2live]

Also I have a 1-9 twist and it wont stabilize berger 105 nor amax..

 

[Beluebow]

IMHO 1-8 is plenty of twist for the 105's.May even work with the 115's depending on temp and barrel.

 

[roninflag]

my brother got a 1-7.5 twist . only 80% of the bullets reached the target. 6mm-284.

 

[Freedom2live]

So your brother 1-7.5 is not working ??

 

[roninflag]

So your brother 1-7.5 is not working ??

no, it is working . just not up to his expectation, with 80% or so of the bullets actually reaching the target. the problem is he spent around 4000 for the rifle and his expectation was that 100 % would hit the target ( kind of like parachutes , you want them close to 100% reliabilty). interestingly my 1-12 twist 243 shoots awesome.

 

[Freedom2live]

Ron what bullet grain you used

 

[roninflag]

mostly 87 horn bthp, and 88 berger. some 70 balistic tip . a few 68's.

 

[Freedom2live]

Yeah light bullets work great with 1-12

 

[roninflag]

light bullets- i shot the 1-12 .243 in my first ever 1000 yard match. i used a mixture of the the 87 horn and the 88 berger. i was shoooting against a bunch of guys that had shot before. it included one shooting 107s in a 243 , another shooting 80s in 223. scores were 264, 57 and 19 repectively ( 300 possible) . i guess it depends on what you are shooting at . i consider them "just right" for what i shoot at with that rifle..

 

[Rocky Mountain]

1-7 twist is really only needed for the very heavy weight bullets, this fast a twist can be hard on jackets making it hard to find the rite bullet and load

 

[Freedom2live]

My gunsmith at hart barrel says its optimum twist because my 243 aint shootin past 3000fps. There therefore its going around 2856 fps.. it makes sense, also I read about how crapy made bullets will disintegrate with **** bullets. . I ll give it a try.. good shooting at 1000