Correct Weight?

[BulletFactory]

My freind just picked up a DPMS AR-15 in .223/NATO. It has a 16" barrel, and a 1:9 twist. What would the correct jacketed bullet weight be for this rifle?

[Boz330]

55gr should shoot fine but not sure how much heavier you could go.

Bob

[BulletFactory]

Im going for accuracy. As far as I know, there is an optimum bullet weight for a given barrel length, and twist.

[Taylor]

My understanding is you can increase weight up to about 70 or so grains.I use 55 grains in a 1-9 twist.A 100 yd zero,and 69 grain bullets shoot about 3" high,but still group well.

[plainsman456]

I have shot 55-69 in mine so far with good targets.

I have some heavier but have not had the time to play with them yet.

[Combat Diver]

50-75 gr should be fine in his rifle. Remember each will have a prefered load. The 1:9 may not stabalize the heavier 77grainers. Cheapest ammo to find used to be the 55gr FMJ and 62 gr FMJs and these were the most common.


CD

[MtGun44]

As mentioned it is a range. Note that LENGTH, not weight is the controlling
variable - so a long skinny VLD nosed 60 gr may not work when a short nosed
77 gr may work. Only testing will prove anything.

Bill

[Larry Gibson]

+1 on the 50 - 75 gr bullets in the 9" twist. However, with some 70 - 75 gr j bullets the velocity may not quite be high enough out of the 16" barrel. Shouldn't have any problems with 50 - 69 gr j bullets though.

Larry Gibson