Ar Reloading:twist Vs. Bullet Wt.

[supersonic]

I''ve searched, but can't find a "definitive" answer. 16"BBL=1/7; 20"BBL=1/8; 20"BBL=1/9. Loading Hornady 52,55,62,68,75,80gr. bullets & Sierra 77,80gr. bullets. This may be a lot to ask, so ANY real educated/experienced help would be highly appreciated (not to mention saving me a lot of LONG range testing & component(s) $$$$$$), so could some badass AR-15 reloader out there either match the above up for me; or a link which provides the same would be great. Tanx.
S.S.

[Prc329]

General rule is the faster the twist the heavier the bullet. That being said you should not shoot a 77 grain bullet threw a 1/9 twist barrel. You can but it may not stabilize the bullet flight and loose accuracy.

Check the ammo oracle for more information.

[1911whore]

http://www.eskimo.com/~jbm/calculations/traj/traj.html

this link will serve you well. you can play with velocity, bullet weight etc.

[Gunsrruss]

This is what works for me....

1X9 50gr up to 69gr....for 69gr on up to 90gr use the 1 X 8 or the 1 X 7.7 which is the same as 1 X 8