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12/11/2018 1:58:31 AM
11/9/2018 9:21:38 PM
Posted: 5/4/2004 5:47:59 PM EST
[Last Edit: 5/4/2004 5:54:55 PM EST by ibffsteve]
First off let me appoligize if this has been asked before as the search function isn't working yet.
I'm getting ready to order a 24" SS upper from Model 1 or J&T(haven't decided yet)and I'm not sure which twist I should get if I go with the Model 1...1-8 or 1-9. Does the 1-8 work better with heavier bullets or is it the 1-9?
Also Anyone ordered a J&T with porting?Opinions?
Link Posted: 5/4/2004 6:06:44 PM EST
Depends on what type (design grain, etc) bullets you will be firing. Check out the Ammo Oracle for the scoop on what twists are for what bullets.

Link Posted: 5/4/2004 6:49:53 PM EST
It's not the weight of the bullet that determines the optimum twist rate, it is the length of the bullet. I guess the two are related. If you plan on shooting 75 gr. and heavier rounds get the 1:8 twist, if you are just going to shoot 55's and under stick with the 1:9. A 1:8 is capable of over-spinning a high velocity 40-45 gr. round, and it has been known to "disappear" in flight and never make it downrange, i.e. it disintegrates in flight. 55's will shoot just fine in a 1:8 and still give you the option of using longer bullets.
Link Posted: 5/5/2004 2:14:33 AM EST
As the 1/8 twist will handle ALL of the available 223 rounds I'd pick a rifle w/ 1/8 twist.

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