Warning

 

Close

Confirm Action

Are you sure you wish to do this?

Confirm Cancel
Member Login

Posted: 10/17/2016 10:23:01 PM EDT
Link Posted: 10/18/2016 1:14:43 AM EDT
I'd kinda like to know more about what was causing it to mess up in full auto. If something failed or if after cleaning it ran fine. It would be really interesting to see what happened to the accuracy after all of that. I'd love to see the barrel cut in half as well to see how bad the gas port erosion was and how much of the rifling was completely gone.

That being said you do have to give the gun credit for doing a good job.
Link Posted: 10/18/2016 1:26:02 AM EDT
Impressive, gas tubes would have melted at 1/5 that round count
Link Posted: 10/18/2016 1:41:38 PM EDT
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By ccosby:
I'd kinda like to know more about what was causing it to mess up in full auto. If something failed or if after cleaning it ran fine. It would be really interesting to see what happened to the accuracy after all of that. I'd love to see the barrel cut in half as well to see how bad the gas port erosion was and how much of the rifling was completely gone.

That being said you do have to give the gun credit for doing a good job.
View Quote


Accuracy would be garbage. Firing that many rounds on full auto smoothed out the bore on either end. Only rifling remained in the middle. I'm guessing what caused it is fouling in the piston, so the gun wasn't getting enough energy to the action. POF's have adjustable gas regulators, though. Add more gas and away she goes. Also notice how the gun starts to function better once the magazine is partly empty. Another clue of short stroking due to insufficient bolt energy. The magazine spring pressing up against it is causing too much friction. When the mag gets low the spring pressure lets up and the bolt can move freely. Again, more gas needed.
Link Posted: 10/18/2016 2:17:20 PM EDT
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By ccosby:
I'd kinda like to know more about what was causing it to mess up in full auto. If something failed or if after cleaning it ran fine. It would be really interesting to see what happened to the accuracy after all of that. I'd love to see the barrel cut in half as well to see how bad the gas port erosion was and how much of the rifling was completely gone.

That being said you do have to give the gun credit for doing a good job.
View Quote

He said that he wasn't firmly locking the gun into his shoulder pocket and putting enough pressure on it.
It went into full auto and did complete mag dumps a few times later in the video after firm up his bracing, but there were still a fair number of burst fires - rack - tap - burst fire - rack - etc.

I feel confident if he would have given the BCG a quick spritz of lube around the 1,000 rd. mark it would have continued to run on full-auto.

Three shells got stuck in the throat which I found surprising. One of POF's engineering touts is their E2 extraction assist technology (they basically use 4 small channels cut into the throat to allow some gas back pressure to leak around the upper neck of the expanded case and push back against the shoulder to unseat it and make it easier it for the extractor to pull it out.

Precision is toast. He showed that much of the rifling inside the barrel was work but still there, just forward of the throat and just behind the muzzle was gone. Smooth bore. While not a totally shot out barrel, precision would be out of the question.1-MOA - not any more. It's definitely a SAW at this point.
Link Posted: 10/19/2016 12:53:22 AM EDT
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By 35mm_Shooter:
Impressive, gas tubes would have melted at 1/5 that round count
View Quote

You must not be familiar with his other videos.
Link Posted: 10/19/2016 1:01:33 AM EDT
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By 35mm_Shooter:
Impressive, gas tubes would have melted at 1/5 that round count
View Quote
errrrrrrrrrrrrrrrrr
Link Posted: 10/19/2016 2:44:42 AM EDT
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By 35mm_Shooter:
Impressive, gas tubes would have melted at 1/5 that round count
View Quote


Actually, the barrel was the point of failure in the DI gun.
Link Posted: 10/19/2016 3:09:23 AM EDT
I wonder how much port pressure drops when there is that much blow by? The muzzle flash got WAAAAAY bigger as the test progressed.

Also, what's with the stuffed chicken?
Link Posted: 10/19/2016 10:17:04 AM EDT
[Last Edit: 10/19/2016 10:17:29 AM EDT by notgrownupyetSBR556]
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By Shadow_Dancer:

He said that he wasn't firmly locking the gun into his shoulder pocket and putting enough pressure on it.
It went into full auto and did complete mag dumps a few times later in the video after firm up his bracing, but there were still a fair number of burst fires - rack - tap - burst fire - rack - etc.

I feel confident if he would have given the BCG a quick spritz of lube around the 1,000 rd. mark it would have continued to run on full-auto.

Three shells got stuck in the throat which I found surprising. One of POF's engineering touts is their E2 extraction assist technology (they basically use 4 small channels cut into the throat to allow some gas back pressure to leak around the upper neck of the expanded case and push back against the shoulder to unseat it and make it easier it for the extractor to pull it out.

Precision is toast. He showed that much of the rifling inside the barrel was work but still there, just forward of the throat and just behind the muzzle was gone. Smooth bore. While not a totally shot out barrel, precision would be out of the question.1-MOA - not any more. It's definitely a SAW at this point.
View Quote View All Quotes
View All Quotes
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By Shadow_Dancer:
Originally Posted By ccosby:
I'd kinda like to know more about what was causing it to mess up in full auto. If something failed or if after cleaning it ran fine. It would be really interesting to see what happened to the accuracy after all of that. I'd love to see the barrel cut in half as well to see how bad the gas port erosion was and how much of the rifling was completely gone.

That being said you do have to give the gun credit for doing a good job.

He said that he wasn't firmly locking the gun into his shoulder pocket and putting enough pressure on it.
It went into full auto and did complete mag dumps a few times later in the video after firm up his bracing, but there were still a fair number of burst fires - rack - tap - burst fire - rack - etc.

I feel confident if he would have given the BCG a quick spritz of lube around the 1,000 rd. mark it would have continued to run on full-auto.

Three shells got stuck in the throat which I found surprising. One of POF's engineering touts is their E2 extraction assist technology (they basically use 4 small channels cut into the throat to allow some gas back pressure to leak around the upper neck of the expanded case and push back against the shoulder to unseat it and make it easier it for the extractor to pull it out.

Precision is toast. He showed that much of the rifling inside the barrel was work but still there, just forward of the throat and just behind the muzzle was gone. Smooth bore. While not a totally shot out barrel, precision would be out of the question.1-MOA - not any more. It's definitely a SAW at this point.


But poof says its rifle don't need no lube to run. Testing the rifle the way the maker says it is supposed to be run was the point of the video.

Mildly impressed it worked so well.

eta: spelling oopsy
Link Posted: 10/19/2016 11:52:28 AM EDT
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By notgrownupyetSBR556:


But poof says its rifle don't need no lube to run. Testing the rifle the way the maker says it is supposed to be run was the point of the video.

Mildly impressed it worked so well.

eta: spelling oopsy
View Quote View All Quotes
View All Quotes
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By notgrownupyetSBR556:
Originally Posted By Shadow_Dancer:
Originally Posted By ccosby:
I'd kinda like to know more about what was causing it to mess up in full auto. If something failed or if after cleaning it ran fine. It would be really interesting to see what happened to the accuracy after all of that. I'd love to see the barrel cut in half as well to see how bad the gas port erosion was and how much of the rifling was completely gone.

That being said you do have to give the gun credit for doing a good job.

He said that he wasn't firmly locking the gun into his shoulder pocket and putting enough pressure on it.
It went into full auto and did complete mag dumps a few times later in the video after firm up his bracing, but there were still a fair number of burst fires - rack - tap - burst fire - rack - etc.

I feel confident if he would have given the BCG a quick spritz of lube around the 1,000 rd. mark it would have continued to run on full-auto.

Three shells got stuck in the throat which I found surprising. One of POF's engineering touts is their E2 extraction assist technology (they basically use 4 small channels cut into the throat to allow some gas back pressure to leak around the upper neck of the expanded case and push back against the shoulder to unseat it and make it easier it for the extractor to pull it out.

Precision is toast. He showed that much of the rifling inside the barrel was work but still there, just forward of the throat and just behind the muzzle was gone. Smooth bore. While not a totally shot out barrel, precision would be out of the question.1-MOA - not any more. It's definitely a SAW at this point.


But poof says its rifle don't need no lube to run. Testing the rifle the way the maker says it is supposed to be run was the point of the video.

Mildly impressed it worked so well.

eta: spelling oopsy


Yes, but I'm sure when POF made that claim they meant under normal operating conditions.

Running 2,500 rounds consecutively in full-auto with no breaks and not even a quick rag wipe down - I don't think this was what they had in mind.
But, nonetheless, it continued to run in semi-auto.

I wished he would have taken a moment to take the temperature of the BCG after the test. Curious as to exactly how hot it got.

Also, I wonder how much it costs to get a full-rock and roll POF? I've seen a few of his vids on the web. Thought he was only civi. Didn't know he had his manufacturer's license.
Link Posted: 10/19/2016 9:19:34 PM EDT
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By SilenceThis:

You must not be familiar with his other videos.
View Quote View All Quotes
View All Quotes
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By SilenceThis:
Originally Posted By 35mm_Shooter:
Impressive, gas tubes would have melted at 1/5 that round count

You must not be familiar with his other videos.


You must not be familiar with testing from Colt

https://www.youtube.com/watch?v=Kzfm4pYhIyY&NR=1&feature=fvwp
Link Posted: 10/19/2016 9:20:42 PM EDT
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By Kiran04:


Actually, the barrel was the point of failure in the DI gun.
View Quote View All Quotes
View All Quotes
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By Kiran04:
Originally Posted By 35mm_Shooter:
Impressive, gas tubes would have melted at 1/5 that round count


Actually, the barrel was the point of failure in the DI gun.


If you use an ass backward profile like an A2 or M4 profile

There have been several tests where the gas tubes failed first
Link Posted: 10/19/2016 9:55:13 PM EDT
[Last Edit: 10/20/2016 11:24:57 AM EDT by Shadow_Dancer]
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By 35mm_Shooter:


If you use an ass backward profile like an A2 or M4 profile

There have been several tests where the gas tubes failed first
View Quote View All Quotes
View All Quotes
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By 35mm_Shooter:
Originally Posted By Kiran04:
Originally Posted By 35mm_Shooter:
Impressive, gas tubes would have melted at 1/5 that round count


Actually, the barrel was the point of failure in the DI gun.


If you use an ass backward profile like an A2 or M4 profile

There have been several tests where the gas tubes failed first


Going to have to concur. In the limited number of sustained fire torture tests that I've seen with DI guns, the component that failed first was the gas tube.
Not that this was always the case (have seen other components blow first) but overwhelmingly it was the 'thin gauge aluminum tube with 20º kink in it that makes for a wonderful point of restriction' that failed.

In some ways I'm surprised it wasn't made from a material like Iconel.
Link Posted: 10/19/2016 10:27:24 PM EDT
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By 35mm_Shooter:


If you use an ass backward profile like an A2 or M4 profile

There have been several tests where the gas tubes failed first
View Quote View All Quotes
View All Quotes
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By 35mm_Shooter:
Originally Posted By Kiran04:
Originally Posted By 35mm_Shooter:
Impressive, gas tubes would have melted at 1/5 that round count


Actually, the barrel was the point of failure in the DI gun.


If you use an ass backward profile like an A2 or M4 profile

There have been several tests where the gas tubes failed first


Well this wasn't one of them. Iraqveteran8888 did the AR15 meltdown first, and the barrel went kablooey before the gas tube or the gas block.
Link Posted: 10/24/2016 8:37:44 PM EDT
I kind of don't get the point of this kind of destruction testing. Why do it? These aren't water-cooled machine guns and The Battle of the Somme was concluded a long time ago.

I'm not trying to be deliberately obtuse here or to troll. I like Eric and Chad and miss Barry a great deal. I like the other segments the crew films. It just seems needlessly dangerous and destructive, and I don't find it particularly instructive - It's like asking, "Can my passenger car drive from Tierra Del Fuego to Nome, AK?" then, doing it.
Link Posted: 10/24/2016 8:49:57 PM EDT
Dupe.
Link Posted: 10/24/2016 9:19:19 PM EDT
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By FOGeologist:
I kind of don't get the point of this kind of destruction testing. Why do it? These aren't water-cooled machine guns and The Battle of the Somme was concluded a long time ago.

I'm not trying to be deliberately obtuse here or to troll. I like Eric and Chad and miss Barry a great deal. I like the other segments the crew films. It just seems needlessly dangerous and destructive, and I don't find it particularly instructive - It's like asking, "Can my passenger car drive from Tierra Del Fuego to Nome, AK?" then, doing it.
View Quote



Youtube view count...
Link Posted: 10/24/2016 9:34:05 PM EDT
[Last Edit: 10/24/2016 9:34:28 PM EDT by jaqufrost]
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By Kiran04:


Actually, the barrel was the point of failure in the DI gun.
View Quote View All Quotes
View All Quotes
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By Kiran04:
Originally Posted By 35mm_Shooter:
Impressive, gas tubes would have melted at 1/5 that round count


Actually, the barrel was the point of failure in the DI gun.
That's because it was the wrong barrel steel for sustained full auto fire not to mention a poor profile choice - at least if one of your goals is sustained fire.
Top Top