Need Input On My New 300 "whatever" Rifle

[rsilvers]

Griffin cans don't have thread reliefs on them. Maybe he does now, I am not sure.

This is the Remington threading:



Griffin discusses it here (you can post this on AR15 if you wish):

http://www.silencerresearch.com/Foru...pic.php?t=1939

Griffin says:

"Opting for an .093"-.125" or so thread relief may be compatible with more suppressors/muzzle devices on the market. In my opinion more compatibility is a good idea."

Macman wrote:

"Did not think a relief was needed when I threaded two of my rifles last month,as both of the suppressors have a thread relief."

Tornado Technologies, an awesome barrel threading company, said:

"Unless the customer requests it, or we see some reason why not to do it, all .308's we now thread are done the same way as the Remington rifle.

Every major manufacturer that I've seen out there has a relief in their can."

I am not sure why Green0 is saying that AAC's position is that as long as it fits their can, then it is ok. That is not my position. I can take a barrel with or without its own thread relief, but a can certainly should have one. Green0 (Griffin) says Remington should make the barrel compatible with as many cans as possible, but yet he does not make his can compatible with as many barrels as possible.

So why did I not put a thread relief there? I wanted to leave as much material as possible for rigidity. Was that the only way to do it? No, but it was done by design.

[ds762]

Originally Posted by rsilvers

Griffin cans don't have thread reliefs on them. Maybe he does now, I am not sure.

Griffin discusses it here (you can post this on AR15 if you wish):

I never once saw a statement made by GreenO admitting the lack of thread reliefs .. that said I'll look further before I comment more.

rather than myself posting this on ARFCOM .. why don't you address this personally over there? I mean I know AAC is banned from the website but surely you aren't also??

[rsilvers]

Yes, I tried to register about a week ago and they said:

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[BWE Firearms]

I have more recently learned there is a time and place for each. Most barrel threading jobs I thread to the specs I can come up with. My biggest problem is a lot of times I am threading a barrel when the customer has not even got a suppressor yet and as we all no every manufacturer has their own specs, 22 LR cans being the worst. I cut a thread relief on almost all threading jobs. I understand why manufacturers don't do it on production guns. When I build one of my integrally suppressed rifles that will only ever have my suppressor on it I do the old trick of backing out the cross feed on the last thread to get a nice snug fit. I would never do this for a screw on can.

I am currently working on an integrally suppressed bolt action rifle and folding stock setup that should be a hit. Most of it will be designed to have it made by a machinist not a gunsmith. I will just work all my magic in the final fitting.

Originally Posted by rsilvers

Where we seem to disagree is when one picks one over the other. You would probably say that if you want a barrel threaded, to use a gunsmith. I would want it done to a drawing, so I would use a machinist.

You are a gunsmith and a machinist, so you quality for both.

[rsilvers]

I see Green0 is calling this a shortcut. I approved this thread design, and I did not leave that area with additional material to save Remington money when cutting the threads. I did it that way because I believed it was the best way to make male threads on a barrel. He is speculating.

Moreover, a lot of people are speculating that Remington does not locate the bore center like a good custom gunsmith. Yes, these threads are held concentric to the bore, not the barrel OD.

[ds762]

Originally Posted by rsilvers

I see Green0 is calling this a shortcut. I approved this thread design, and I did not leave that area with additional material to save Remington money when cutting the threads. I did it that way because I believed it was the best way to make male threads on a barrel.

SO .. you are admitting that its your opinion on the best way to make male threads.

Is this opinion based on your engineering degree, your machinists degree, your gunsmithing degree, or what? My point is this .. why is your opinion here on this matter valid?

[rsilvers]

Yes, it is an opinion/judgement call. One precedent is the M16 barrel, which has no thread relief and 0.100 from the shoulder to the first thread, and a 0.016 radius. The A2 flash suppressor has the relief in it. Green0/Griffen should know that to make an M16 silencer one needs a thread relief in the silencer of more than 0.100 in length. Yes, this is a 308 can, but the same logic applies - you cannot count on a barrel having a thread relief as it is far more common to put them in the female parts.

My point was that this rifle appears to be in spec and as designed and not defective, and that is based on being the person who selected the thread specs.

[BWE Firearms]

There are two ways to cut threads at the shoulder, With a relief cut and without a relief cut. Both are correct and cutting threads without a relief cut is actually the most popular. I personally cut threads with a relief cut most of the time just because that is how I was taught. There is a long standing debate that the relief cut weakens the barrel leading to the threaded section braking off. I personally don't believe this if the relief is cut properly, unless you are talking about a very wall.

Roberts opinion is valid because he is a good engineer with a lot of experience and trust me we don't see eye to eye on quite a few things. Engineers don't like gunsmiths, gunsmiths don't like engineers and machinist don,t like ether one of us. He like doing it one way I prefer the other and both of us are equally correct. It's all personal preference.

[Code_4]

Well...I am no engineer, gunsmith or machinist, but I did solve my problem...does anyone care? Sorry to distract from a man of science.

As for me I am just a bitter smoke eater that chugs through my days off playing with guns and having a few to many beers Occasionally an idiot prevails....this is my story...

Got out to shoot with the "modified" Paladin block. It worked great and SOUNDED ubber quiet now. I can now use IMG 4227 and H110. A2400 still did not work in this gun. H110 was definitely the quietest with 4227 being a close second. No need for hearing protection now.... The A1680 was the Turd of the bunch and was noticeably louder to all that listened. So that powder is going in the trash.

I did not get any groups shot, but I have good load data now. 9.5 H110 gets me 1040fps and 9.5 of 4227 gets me 1007fps.

Thanks....carry on

[i8asquirrel]

Code 4 glad to hear ya got it worked out....your in for some fun now. Strang that 1680 didnt work for you, Its my favorite powder for my 300WTF but I also have a 16" barrel on them both..Have fun