What's good for my twist?

[Mad Jax]

AR-15 1:9 twist, I've been told that was a great twist ratio for 55 grain surplus ammo. I haven't been finding good prices on 55 grain so what is the heaviest grain I can go with ? Is 62 good to go?

[rromeo]

62 is fine. I'm surprised that you're finding 62 cheaper than 55 though.

[evidens83]

Buy a .22 conversion if you want to save lots of money. Otherwise I'm pretty sure 55g ammo will be cheaper than 62g..

[MrPlutonium]

62 is good to go. You might even be ok with up to 75 grainers. Just no extra long tracers for you.

[Mad Jax]

Thank you

[Agustav]

I've shot as light as 45gr and as heavy as 75gr out of 1:9 twist AR. You are gtg with 62gr!

[Mad Jax]

where to go for 55gr surplus ammo (5.56) at a reasonable price?

[Reductio]

where to go for 55gr surplus ammo (5.56) at a reasonable price?

Here, get some PMC or Prvi and you're set.

[stitchnicklas]

miwal @ the gunshows....lake city reloads for 135.00 for 500...my AR eats them all day long..

[makaio]

I recently picked up 1000 rounds of 62 g and it was $20 cheaper than the 55g at SG ammo sales.

[diginit]

The 1 twist in 9 inch barrel was designed for 52 to 69 gr. bullets. Your good with 62 graniers.

[Greg-Dawg]

Is there a reliable of rifle twists=bullet grain?

[Boots]

I good read... and has a chart for recommended bullets weights VS barrel twist rate.

http://www.6mmbr.com/223Rem.html

[IsaacGlass]

Darn, I thought this was a dance party

[Mad Jax]

Thanks for the good info and the leads to the sites, Here is a dangerous question, picked up a spare AR-15 16" barrell told it was 5.56 but it is has no markings, no stamps, nothing. How do I find out what the twist is and if it is truely 5.56 or .223 ? ( I tried counting the twists in the barrell, I got dizzy)