CA legal rifles must have 16in barrel???

[motorwerks]

Yea unless you get it leaded as a SHR. search please.

I have no idea what you just said.

[TKM]

Interesting so you've just negated Merc1138's whole Newtons law, you should have learned about that in Jr. High rant. Thank you!

Not entirely sure where you are going with that so here is an excerpt from the Ferret Firearms FAQ.

What barrel should I get?

When choosing a barrel, ther are a few things to keep in mind. Storage, transport, ammo, recoil and shooting distance.

The 18" inch barrels, available only in chrome-moly steel with a hybrid chamber, are effective to approx 900yd. The advantages are that it is easy to transport and store. Also, a Ferret50 with an 18" barrel can be shoulder fired by the average person. The 18" barrels have the least recoil and velocity.

The 29" barrels are effective to approx 1300yd and is the favored barrel length of our customers.

The 36" barrel will yield the most velocity from a given load, but also yields the most recoil. Effective range is approx 1600yd. Most of our customers who shoot competition choose the 36" barrel.

[rero360]

I think in that case, with the 36" barrel you are getting complete powder burn in the barrel, thus getting max velocity which equals max recoil, all other things the same.

[Merc1138]

Interesting so you've just negated Merc1138's whole Newtons law, you should have learned about that in Jr. High rant. Thank you!

He didn't negate anything. All you've done is shown that you failed to read the entire thread, newton's laws still apply. Read the thread and you'll see that barrel length affects velocity, and if so much of the powder is burning outside the barrel and unable to accelerate the round any faster, recoil will be reduced.

So are you a troll afterall? Everything has been explained to you in this thread by other people besides my own replies. Seriously, get an education. At the very least make sure you've read the entire thread that you're replying to before you show the world your ignorance on the matter.

[Jpach]

How do you figure, so if you have a pistol and a rifle that shoot the same exact bullet the pistol should be more accurate? Good luck with that. Guess that's why snipers use carbines huh.

I would imagine that a military sniper would use a longer barrel for increased velocity, and thus, increased range.


What I stated in my previous post is reality.

[captbilly]

Short is generally more accurate

Pretty much, There is a point where going shorter has a negative effect, due to the bullet not getting stabilized enough before it leaves the muzzle as well as loss of velocity becomes extreme. There is also a point where if you go too long, the bullet will start to slow down while its still in the barrel, just as bad.

It all depends on caliber, powder used and all that for what the optimal barrel lengths are.

A shorter barrel of the same cross section will be stiffer and therefor will move less from the stress of shooting. However, this does not mean that a pencil barrel 14.5" with flash hider will be more accurate then a 26" heavy target barrel with nothing but a target crown on the end. Muzzle velocity will increase with barrel length with any centerfire rifle caliber, out to any practical barrel length. I did a bunch of research on this somemtime ago and for every caliber that I checked (.223 , .308 and others) the muzzle velocity was still increasing at over 30". A. 22 lr will start to lose velocity at about 18" if I remeber correctly, but target shooters still often use longer barrels to help stabilize the gun, by adding mass far from the shooter.

[rero360]

A shorter barrel of the same cross section will be stiffer and therefor will move less from the stress of shooting. However, this does not mean that a pencil barrel 14.5" with flash hider will be more accurate then a 26" heavy target barrel with nothing but a target crown on the end. Muzzle velocity will increase with barrel length with any centerfire rifle caliber, out to any practical barrel length. I did a bunch of research on this somemtime ago and for every caliber that I checked (.223 , .308 and others) the muzzle velocity was still increasing at over 30". A. 22 lr will start to lose velocity at about 18" if I remeber correctly, but target shooters still often use longer barrels to help stabilize the gun, by adding mass far from the shooter.

Oh I agree, I was over simplifying it by a bit in my earlier statement. I know there is a test that Frank (lowlight) was going to do, or did already, where he was going to take a 36" barrel, either .308 or 6.5 CM and take velocity and accuracy readings for each inch of barrel he cut off, to find (for that chambering with that load) the ideal barrel length.

Of course there are so many factors that come into play for length that one is better off going with a length that they feel comfortable with, sticking with it, and then adjusting their ammo to get the results they want, if you reload that is.

In the hunt for the ideal, barrel contour, length, chamber dimensions, and ammo load, bullet weight and design, seating, powder type and charge, primer type, brass type, whether to neck turn, full size resize or neck resize, trim or not, clean and uniform primer pockets or not and about 15 other variables, it makes me wonder sometimes, what will actually give me positive, measurable results, and what may give results but will be lost in the static of the data, that puff of breeze, a heavier than normal heart beat, slightly different stock weld, or the million other things that can change the bullet flight and impact ever so slightly.

At times I'm tempted to not pay so close attention to the fine details, and just load them up and shoot them, even with mixed headstamps I'm still getting groups of 1/2 MOA.

[Merc1138]

Oh I agree, I was over simplifying it by a bit in my earlier statement. I know there is a test that Frank (lowlight) was going to do, or did already, where he was going to take a 36" barrel, either .308 or 6.5 CM and take velocity and accuracy readings for each inch of barrel he cut off, to find (for that chambering with that load) the ideal barrel length.

Of course there are so many factors that come into play for length that one is better off going with a length that they feel comfortable with, sticking with it, and then adjusting their ammo to get the results they want, if you reload that is.

In the hunt for the ideal, barrel contour, length, chamber dimensions, and ammo load, bullet weight and design, seating, powder type and charge, primer type, brass type, whether to neck turn, full size resize or neck resize, trim or not, clean and uniform primer pockets or not and about 15 other variables, it makes me wonder sometimes, what will actually give me positive, measurable results, and what may give results but will be lost in the static of the data, that puff of breeze, a heavier than normal heart beat, slightly different stock weld, or the million other things that can change the bullet flight and impact ever so slightly.

At times I'm tempted to not pay so close attention to the fine details, and just load them up and shoot them, even with mixed headstamps I'm still getting groups of 1/2 MOA.

Of course, there's a lot of factors that are going to affect accuracy, velocity, trajectory, felt recoil, how accurate followup shots can be, etc.

The objective really is to combine every factor you possibly can, and then decide on what barrel length and profile is the best for your situation. I don't think it's really practical for the average human being to add everything up in their head and come up with a result. However there is enough published real world data and simulated data that if you know what you want to do, you can figure out what fits your needs. That said, it's good to at least have an understanding of why things work the way they do.

[chico13]

so sum thing like a Colt CAR-15 is out of the question

but would it be possible to make it CA legal??

[rero360]

so sum thing like a Colt CAR-15 is out of the question

but would it be possible to make it CA legal??

You can have a Colt upper, and all the lower parts be colt except the lower receiver itself.

[chico13]

but the lower receiver is the part that makes the rifle shorter than a regular M16 isn't it and the barrel still has to be 16 in rite??

[rero360]

That is the lower receiver, nothing else, now use some critical thinking to answer your last question.

[ChrisDM]

This. Plus the bad part is anyone that gets a barrel shorter than 16 and permanently fixes a longer muzzle break on it just took that much accuracy away from their rifle even though it ends up to be the same length. Just don't get it.

Shortening a barrel does not decrease accuracy, only velocity.

Sent from my DROIDX using Tapatalk

[NorCalK9.com]

I have a hungarian amd65 11in barrel and muzzle brake perm attached. It does just fine standing shooting at 100yards n less. Loud as hell though my ears are still ringing a week later.