i'm looking to buy a M&P 15 what barrel twist is best or what model is the best????

thanks,
chad

Best twist will depend on what ammo you plan on putting in it. If you are going to shoot Hi-Power Rifle matches ona full 600yd course, you will need a 1-8 or maybe a 1-7.x. If your gonna just shoot 55fmj blasting ammo, then I would go for a 1-12 or 1-14. The less your wind up the cheap bullets the better they tend to shoot. A 1-9 would allow you to shoot the 55 and 68/69 grain bullets.

so if i go with the 1-7 and shoot cheap ammo is it going to hurt anything???

A 1/8" twist is the best overall - it will accurately shoot bullets from 50 gr - 80 gr. A 1/9" is next - it will handle 68-69 gr bullets well and some 75 gr bullets.

1/7 twist is the only one worth considering for an AR. It will shoot 55gr plinking ammo all the way up to heavy 77gr very well.

If the only thing you ever want to do with your rifle is shoot 55gr bullets at a 100 yard target for groups, then you can consider a 1/9. To me that is a sad use for an AR, so I only recommend 1/7 to people buying a new AR.

No. 55gr shoots very well in a 1/7 twist.

thanks guy's

This is close but anyone stating absolutes about "best" wants to limit you as they are limited. 1/7 twists do NOT handle 40grn varment loads as well as 1/9.

http://ammo.ar15.com/ammo/project/perf_whattwist.html

Yea, gotta go out an kill some commies. What exactly is an AR-15 suppose to be used for? Go to carbine and tactical classes and "Pretend" that you're a mercenary? Maybe long range shooting competition where you breath cautiously for 1 shot every couple minutes; trying to make a 2nd bullet go through the same hole as the 1st bullet?

I have no problem with anyone involved in competition, marksman, or even tactical type training. But a gun's primary purpose is #1: Kill a living creature (In the case of an AR-15, a human) and #2: Enjoy shooting the gun. If a person enjoys sitting 100 yards out punching holes in paper, good for them. More power to them. Maybe they'll set up some tin cans, tennis balls, and a few other targets. I think it's great. Why in the world is that a waste of an AR-15? The same argument can be said for more than 75% of all automobiles. Such a waste of fuel and space when the vast majority of individuals/families can easily get away with an economical Focus or similar.

.223 ammo is about the cheapest available other than 22LR. The next closest in 7.62x39. And getting a "Bolt Action" .223 would probably cost as much or more than an AR-15. So getting an AR-15 for punching paper holes is a very practical purpose for the gun.

You talk a lot, and obviously did not understand what I said. Re-read what I posted a few times and try again.

I think I read that pretty accurately. If not; then explain it to me.

Not gonna hurt a thing plus it opens you up for some really nice heavy target loads too. As others have said, twist is relative to the projectile weight. Heavier bullets need that extra spin to be stable. Try shooting 75gr out of a 1:9 and you're going to be sorely dissapointed.

The simple answer to your question is no.

There are some pretty vicious hunting loads from 45-64gr and some great match rounds too.

I have tried 50gr VMAX and 63gr Sierra SP, both great bullets. The VMAX always impresses me in the accuracy department, especially from my 16" 1/7 carbine. I have a box of 40gr VMAX bullets but haven't loaded them up yet, would need to send those down my 20" 1/8 stainless and even that might be a bit fast. I don't have a use for the super light bullets so I don't have any slow twist barrels.

x2....I'm glad I wasn't the only. I reread his statement several times....kept coming out the same way.

__________________
Stu

for all around use 1/7 all the way

Sigh!.............again................It depends on what you will ACTUALLY shoot with it. All but the heaviest rounds do well in a 1/9 and can still use the lighter , varmint rounds of 40-45 gr. IF you are using as an LEO or serious match shooter, 1/7. One size only fits those who don't know what they really want or will use it for and think BIG or COMBAT means the best. Well, that gets pretty expensive for a casual or even serious, frequent target shooter. Probably, XM193 55 grn. 5.56 rounds are the most commonly used ammo. by club and casual shooters.

Most of us, I think, use ar15s for recreation or small varmint hunting. Otherwise, we would probably be issued an M16(real M4) by our Unit or Dept.

http://ammo.ar15.com/ammo/project/pe...ttwist.html]:: Ammo Oracle[/url]

Thanks again guy's i ordered a Sig Sauer 516 this week. have you seen anything good or bad about the Sig??

That's a very good analogy.

False assumption. One can buy a very nice .223 bolt action for about half of the cost of an AR-15 and it would be a better tool for the job of putting holes in paper.

But, this is America and fortunately we have the right to choose to slog our morning commute in a lifted 4x4 9 passenger SUV, or shlep the kids to school in a 911, or put holes in paper with and assault rifle.

By the same token, we also have every right to heap scorn upon people who do such things.