Crowning

Yes, it can be legal to make a silencer. For everything Form-1, from silencer designs that are easily made, to filing forms with the BATF, to 3D modeling. Remember, you must have an approved BATF Form-1 to make a silencer. All NFA laws apply.

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Capt. Link.
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Re: Crowning

Post by Capt. Link. » Thu Mar 10, 2016 12:38 pm

Its obvious that Skippy is here to argue not to learn or share knowledge why respond.
The only reason after 243 years the government now wants to disarm you is they intend to do something you would shoot them for!
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Re: Crowning

Post by Samson1044 » Thu Mar 10, 2016 2:21 pm

silencer_kid wrote:
Samson1044 wrote:
If someone left a finish like that on the crown of my rifle id be PISSED ,
you do know that was a pic just showing the various crown types, right?

i guess Don Geraci is not in the majority group that say angled crown is better than 90.

most will tell us
"11 degree is standard, recessed or not. it is optimal in terms of reduction of instability in flight caused by gas blow by at the moment of the bullet's exit from the muzzle"

and

"11 degree crown is supposed to be the most accurate, at least in a rifle. It was tested and developed by benchrest shooters, who are guys that spend lots of time and money trying to put 5 rounds into 1 hole."

how much more accuracy do you get can be debated until man lands on Venus.
How many bench rest rifles have you shot??
How many guns how you built that will shoot into one ragged hole??

That is like saying that a 21.5" inch barrel is the optimum length to have perfect harmonics for best accuracy
its a complete myth but a s--t ton of people still buy into it.
just like there are a lot of people that think fluting a barrel will make it stiffer
That cut rifled barrels are more accurate that button rifled yet both hold world records
Hell I know people that won't shoot a match and hope to win unless they have their lucky socks on.

If you believe that an 11 deg crown is the most accurate then by all mean use that , anybody that looks at it and says it would be more or less accurate than a flat crown or 15 deg crown doesn't have the knowledge on the subject to be speaking on the subject , because quite honestly i've seen the compound on lathes vary more than 2 degrees.
ultimate accuracy dealing with the crown boils down to weather or not the bullet breaks free evenly from the bore so that the gasses don't push the ass of the bullet to one side or another as it leaves. the base of the bullet where its sealing the gas can vary a bit after all the jackets are just punched copper cups and dies wear over time.

In the video above it showed the barrel being dialed in with a range rod and appears that he only dialed it in on one point , personally I thinks that a bad idea for superior accuracy. I use a long reach indicator and dial in directly off the bore in two points and adjust the barrel coaxially so that its spinning true and strait the last couple inches. Does this mean that guys who use a range rod are wrong or not capable of building an accurate rifle , hell no 999,999,999 times out of 1,000,000,000 the gun will shoot better than a human can shoot it.

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Re: Crowning

Post by 1rflman » Thu Mar 10, 2016 5:23 pm

Capt. Link. wrote:Its obvious that Skippy is here to argue not to learn or share knowledge why respond.
It's an exercise in futility to attempt to convince the smartest person around who knows everything, who bases his knowledge on theorized suppositions and who deals in exaggerated generalities, that facts based on scientifically controlled testing and experiences prove him to be wrong.

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Re: Crowning

Post by silencer_kid » Thu Mar 10, 2016 6:50 pm

Samson1044 wrote:
How many bench rest rifles have you shot??
yada yada yada
it wasnt an argument around 79 degree cut! re-read OP.

please post your scientific references for your claims, i am ready to read.

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Re: Crowning

Post by Shanks » Fri Mar 11, 2016 10:45 am

Didn't mean to start a war over the crown.

It really had less to do with the most shuper duper angle for a shuper duper bench gun and how my lathe is as far as 2° off on the compound as it was about reducing the length of cans on say, tacticool 300s or 556s

Thanks for the real scientific / technical input, however.

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Re: Crowning

Post by whiterussian1974 » Fri Mar 11, 2016 11:08 am

Shanks wrote:Didn't mean to start a war over the crown.
Earlier I thought of posting some pics of infants crowning, but my prefrontal cortex kicked in just in time. :lol:
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CMV
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Re: Crowning

Post by CMV » Fri Mar 11, 2016 7:58 pm

Some people add little or no value to any discussion so why waste time reading it or trying to correct it? I just see this and it makes the experience here so much better. Try it & see if you don't enjoy this forum a lot more. :)

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Re: Crowning

Post by 300sniper » Sat Mar 12, 2016 12:54 am

Shanks wrote:Didn't mean to start a war over the crown.

It really had less to do with the most shuper duper angle for a shuper duper bench gun and how my lathe is as far as 2° off on the compound as it was about reducing the length of cans on say, tacticool 300s or 556s

Thanks for the real scientific / technical input, however.

I apologize for getting the thread off track from your question. I posted originally because not all barrels are crowned to 11 degrees, many are not and are just as accurate.

To get to your actual question, if you cut the muzzle to a 60 degree included angle to match the suppressor baffles, it would only be about 1/8" deep based on a 5/8-24 thread on a 30 cal barrel. I really doubt that would have any measurable affect on suppression. It would also look pretty goofy when no muzzle device was installed. That is just my opinion, of course.

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Re: Crowning

Post by fishman » Sun Mar 13, 2016 10:57 am

Samson1044 wrote: just like there are a lot of people that think fluting a barrel will make it stiffer
if you take a barrel and flute it it gets less stiff. but if you take two barrels of equal length and equal weight, one skinny, and one larger OD and fluted, the fluted one will be more stiff.
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Re: Crowning

Post by whiterussian1974 » Sun Mar 13, 2016 11:48 am

fishman wrote:
Samson1044 wrote: just like there are a lot of people that think fluting a barrel will make it stiffer
if you take a barrel and flute it it gets less stiff. but if you take two barrels of equal length and equal weight, one skinny, and one larger OD and fluted, the fluted one will be more stiff.
The purpose of Fluting is to lower weight, increase heat dissipation area and yet retain the stiff girders limiting barrel-flexing. It gives nearly as much stiffness as a .825"OD barrel, by leaving the struts @ .825"OD while the grooves are .625"OD.
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Re: Crowning

Post by texan_eagle_scout » Tue Mar 22, 2016 5:47 pm

fishman wrote:
Samson1044 wrote: just like there are a lot of people that think fluting a barrel will make it stiffer
if you take a barrel and flute it it gets less stiff. but if you take two barrels of equal length and equal weight, one skinny, and one larger OD and fluted, the fluted one will be more stiff.
This scenario only works because you increased the diameter to keep the total weight equal. There will obviously be more material in the taller flutes to offset the cut area.

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Re: Crowning

Post by fishman » Tue Mar 22, 2016 6:22 pm

texan_eagle_scout wrote:
fishman wrote:
Samson1044 wrote: just like there are a lot of people that think fluting a barrel will make it stiffer
if you take a barrel and flute it it gets less stiff. but if you take two barrels of equal length and equal weight, one skinny, and one larger OD and fluted, the fluted one will be more stiff.
This scenario only works because you increased the diameter to keep the total weight equal. There will obviously be more material in the taller flutes to offset the cut area.
correct.
that brings us to the original question: are fluted barrels more stiff? the answer is yes and no.
two barrels of equal diameter, the fluted one is less stiff.
two barrels of equal weight, the fluted one is more stiff.

it comes down to what you mean when you ask the question, diameter seems pretty irrelevant too me. weight is the driving factor behind picking and barrel diameter and whether you want to flute or not. Obviously, if weight is not a factor, just get the largest diameter barrel possible and dont flute it.
so if you ask me, fluted barrels are stiffer in general, but you have to understand what I'm comparing.
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Re: Crowning

Post by whiterussian1974 » Tue Mar 22, 2016 7:19 pm

whiterussian1974 wrote:
fishman wrote:
Samson1044 wrote: just like there are a lot of people that think fluting a barrel will make it stiffer
if you take a barrel and flute it it gets less stiff. but if you take two barrels of equal length and equal weight, one skinny, and one larger OD and fluted, the fluted one will be more stiff.
The purpose of Fluting is to lower weight, increase heat dissipation area and yet retain the stiff girders limiting barrel-flexing. It gives nearly as much stiffness as a .825"OD barrel, by leaving the struts @ .825"OD while the grooves are .625"OD.
Fisherman: Seems like I said essentially the same thing. :?

No love for Rus?
I'm just looking for a pat on the back. Fishing for compliments really. :D
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Re: Crowning

Post by fishman » Tue Mar 22, 2016 7:26 pm

whiterussian1974 wrote:Fisherman: Seems like I said essentially the same thing. :?

No love for Rus?
I'm just looking for a pat on the back. Fishing for compliments really. :D
I was agreeing with you, just not blatantly saying it. *pats back* there ya go :D
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Re: Crowning

Post by whiterussian1974 » Tue Mar 22, 2016 7:31 pm

fishman wrote:
whiterussian1974 wrote:Fisherman: Seems like I said essentially the same thing. :?

No love for Rus?
I'm just looking for a pat on the back. Fishing for compliments really. :D
I was agreeing with you, just not blatantly saying it. *pats back* there ya go :D
Thank you.
We all need emotional stroking occasionally. Today is my day. Pretty rough.
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Re: Crowning

Post by silencer_kid » Wed Mar 23, 2016 12:30 am

CMV wrote:Some people add little or no value to the discussion.
↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑

so, as example.................... :lol: :lol: :lol:

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Re: Crowning

Post by Tony M. » Wed Mar 23, 2016 11:46 am

silencer_kid wrote: ↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑

so, as example.................... :lol: :lol: :lol:
↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑

So, as example.................... (We need a F--k off, and when you get there, keep fucking off until you've fucked off so far, there's no place left to go, and then F--k off some more, emoticon)

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whiterussian1974
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Re: Crowning

Post by whiterussian1974 » Wed Mar 23, 2016 12:05 pm

Tony M. wrote:So, as example.................... (We need a F--k off, and when you get there, keep fucking off until you've fucked off so far, there's no place left to go, and then F--k off some more, emoticon)
A penis arrow looping over and then into own tush?
Southpark had a logo like that. When "classy" the prostitute spelled her name and then it appeared on her limo.
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