AR Sponsor
Posted: 2/20/2012 5:41:36 PM EDT
|
I hope i got this in the right section
Im in the market for a barrel, but haveing problems finding info about twist rate for lighter loads. I plan on using some production varmint (40-55) ammo as well as trying my hand at reloading some in the same range The barrels ive been looking at are 1:8 What ive seen so far is faster twist = light bullet? Slower twist = heavier bullet? this will be a benched squirrel gun so heavy rounds are not need ( tho they look good when they impact, LOL) Is there a scale out there for twist rate : bullet weight Like 1:8 __gr to __gr 1:10 __gr to __gr so on, or is it dependent on the bullet manufacturer and thier spec as to what stabilizes the best in what twist 
Thanx in Advace |
| You'll get most of your answers here and the associated links http://www.ar15.com/forums/t_3_118/492084_AR15_Discussions__FAQ.htmlks |
|
Quoted:
I hope i got this in the right section Im in the market for a barrel, but haveing problems finding info about twist rate for lighter loads. I plan on using some production varmint (40-55) ammo as well as trying my hand at reloading some in the same range The barrels ive been looking at are 1:8 What ive seen so far is faster twist = light bullet? Slower twist = heavier bullet? this will be a benched squirrel gun so heavy rounds are not need ( tho they look good when they impact, LOL) Is there a scale out there for twist rate : bullet weight Like 1:8 __gr to __gr 1:10 __gr to __gr so on, or is it dependent on the bullet manufacturer and thier spec as to what stabilizes the best in what twist
Thanx in Advace You've got it bassackwards. Bullet length is actually the principal factor in determining twist needed. The longer (heavier) the bullet the faster twist required for stabilization. Shorter (lighter) bullets stabilize with slower twist rates. Bullets made of lighter materials, such as Barnes TSX, are longer than lead-core bullets of similar weight, and require more spin to stabilize. |
AR Sponsor