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Discussion Starter · #1 ·
Hey guys,

Ive been running my octane hd 45 (which is only rated for subsonic 300blk and under calibers) w super 9s super 40s 45supers, 300blk supers on a 16 and 7.5in pistol barrel as well as 5.56. The thing is built like a tank and they under rate it significantly so they can sell you a second can for your mid caliber rifles instead of just one can. (good business sense)

Anyways, looking at muzzle PSI into the first baffle stack a 556 in a 8in barrel and a 300blk in a 7.5in is more PSI than a full bore .308 in a 16in barrel, and significantly less on a 24in. Im thinking about changing the threads on my G3 clone and running it on the 18in barrel there, I would assume it sound sound similar to the 300blk out of the pistol barrel consider first baffle stack psi and exit psi, which on this can is *almost* hearing safe. as in if your wearing a beanie hat covering your ears your ok.

Figure a ton of guys are running this can on there fnp and fnx45's and figured someone might have tried it on a full size gun at some point. Not worried about safety or it exploding, ive had much much worse things happen before and its not a big deal if you take precautions when testing so no thanks, I dont need another mother giving advice. Done the maths its good to go.
 

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Keep us updated on your torture test on the Octane 45. Make some videos and send them to Silencerco. Im interested to see what limits and potential it has.

Im no engineer, but I do not think the Octane 45 is built for the gas volume of a centerfire supersonic rifle round like 5.56, 308, or 300blk super sonic. It may be capable of handling the pressures of the previous but the volume could exceed the capabilities and compromise structural integrity.
 

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Discussion Starter · #4 ·
Keep us updated on your torture test on the Octane 45. Make some videos and send them to Silencerco. Im interested to see what limits and potential it has.

Im no engineer, but I do not think the Octane 45 is built for the gas volume of a centerfire supersonic rifle round like 5.56, 308, or 300blk super sonic. It may be capable of handling the pressures of the previous but the volume could exceed the capabilities and compromise structural integrity.


I already have more than 500 rds of the 556 and 300 thru it no problems. I dont have a full auto yet where I can see the heat being generated being a problem. It has .50cal inner baffles so it can push the gas out a lot quicker when a .22 or .30cal pellet is shooting down the middle.

Looks like your running the 1/2x28 piston on the ruger instead of the fixed mount? Do you have any POA/POI discrepancy with a moving can? I tried the piston on my 556 after shooting it on my g19 and it had a terrible POI shift and it couldnt have been harmonics as it also decreased the capability of 2moa rifle to 4-5min. I also was getting pretty bad accuracy beyond 40yards on my g21 with it no matter how it was oriented, I also had 2 new lone wolf barrels for the .45 to test, soon as can came off halfway thru a mag it would shoot 6-8in groups at 100yards, can back on and coulnt even hit the full size target.

I also stopped running this can wet, the amount of sprayback into the gun and your face is unbelieveable with everything I tried, grease, wirepulling gel, water, watever.
 

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I've used mine on 22LR pistols and rifles, 45 ACP pistols and on 44 Magnum rifles. All 45 shot through it has been factory loads. All 44 magnum shot through it has been handloads, 240gr LSWC at 850-950 fps and also some 200 and 240gr JHP loaded to full power factory 44 Magnum levels. Am I understanding your post correctly, you're running full power 5.56 and 300 BO rounds through your Octane??? That seems really dangerous as SiCo has specifically stated that it's not rated for that.
 

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Discussion Starter · #6 ·
Look at muzzle pressure in psi or kpa for a 9mm +p+ on a 4in barrel or 357 mag and see how it compares to the rifles on longer barrels. I bet this can would work on a 50bmg if it had a 36in or longer barrel. It's all about that shock of psi spike into the first baffle chamber that is going to burst the can open around the threads and blow it apart.
i know it is specifically NOT rated for it because they want to sell you a universal "pistol" can and then a rifle can be just one suppressor.

look at the materials thickness and flow designs of what the entry level 300wm 338lapua etc cans use. There's very little difference and in some case from other manufactures the octane HD is made more tuff. Keep in mind I'm NOT running 458socom or big bore rifles, lots of gas is flowing thru the big bore baffles w small bullets reducing internal chamber pressures and reducing dwell time
 

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I see your logic behind the assumption that the silencer will burst around the threads but that isn't where silencers fail when over pressured. The silencer will typically stretch and blow at the far end of the silencer instead of near the muzzle. The reason for this is the pressure reaching the end and it not being able to handle it. I've seen quite a few silencers that were destroyed and all of them were at close to the last baffle. The other thing that you are leaving out is the heat which causes the silencer to become weak.

So looking at pressure if you look at the pressure of say 9mm +P that is 38,500 which would be the highest thing that the Octane is rated for. But looking at 5.56 the pressure is 55,000 sure you might have a longer barrel but its not going to drop the pressure down to safe levels for the Octane. Now depending on how fast you shoot you might be able to get away with it for a little while but eventually it will break and if it gets too hot it will blow up. Also the difference in the rifle silencers is that they are fully welded to prevent stretching the silencer.

I would highly recommend that you don't shoot 5.56 through the Octane.
 

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Discussion Starter · #8 ·
Thanks for your recommendation. I did mention heat is a problem and do not shoot very fast with it on as almost all my shooting is at least 200yards. I have only witnessed 2 cans bursting and they were both at the threads on the muzzle causing a bulge in the first expansion chamber. And that was on a seriously overdone setup. 223 and 300blk on a 16in barrel is less than 40kpsi and I know you cant recommend that since thats not what the manufacture states and im not recommending anyone go out and try it. Just listing my experiences thus far
 

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I'm still trying to figure out if you're saying that you're running full power supersonic 5.56 and 300BO through your Octane on both pistol and carbine length barrels.

I know the numbers, I did the math and research too before running normal 44 magnums through mine on rifle barrels but if you're running supersonic high power rifle rounds through your can I really think you're asking for trouble. Please clarify what you're setups are and the ammo you're using. I'm really interested in your results. Best of luck.
 

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Discussion Starter · #11 ·
I'm still trying to figure out if you're saying that you're running full power supersonic 5.56 and 300BO through your Octane on both pistol and carbine length barrels.

I know the numbers, I did the math and research too before running normal 44 magnums through mine on rifle barrels but if you're running supersonic high power rifle rounds through your can I really think you're asking for trouble. Please clarify what you're setups are and the ammo you're using. I'm really interested in your results. Best of luck.
7.5in pistol barrel supers
I think its an 8 or 8.5in 556 pistol supers
16in 556 and 300 supers
all of which have been run super wet, dry, frozen, packed w snow etc.

The big bore stuff is less pressure in the chamber and less pressure at the muzzle like the 44mags but higher volume of gas. the ratio of barrel volume to first baffle chamber volume as per bullet size is relative to the volume of gas. Im not explaining what i mean well.. a high pressure tiny charge going into a large chamber will dramatically reduce the pressure, a large bore charge going into the same chamber pressure will be reduced but not by the same % if im explaining what I mean better.
 

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Not to derail the thread, but has anybody used this on a 57 with any success? I have a 45 HD and trying to get a feel for how versatile it will be before I start thinking about another suppressor.


Sent from my iPad using Tapatalk
 

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Got to say it.

FNForum does not endorse the use of any silencer in applications that the manufacturer does not specifically approve of.

While it is common knowledge that some suppressors have cross platform utilization's, FNForum reminds members and guests that for their own safety, they need to ensure that only safe firearm practices are utilized and that dangerous firearm practices puts members and guest at risk, including your buddy or a total stranger standing next to you at the range.


It is a free country, if you want to do it, it is up to you but you are responsible for the outcome and I am sure that if you sue the manufacturer for an exploding 9mm pistol can used on a 30 cal rifle, you will not win. I'm not an attorney and anything can happen but you should not win.

Jeremy from Silencer Shop is very knowledgeable in his field and the membership would be wise to adhere to what he has posted about this. As for me (I have used silencers in cross platform applications), with an education in the engineering field with emphasis in the structural background, I am aware that manufacturers test and rate their items on what they consider safe. I also know they add a margin of safety that is built into the design of the manufactured items. While it may be safe for a time to play in the "margin of safety", it is not recommended. I have seen too many "I'd of never thunk...." moments concerning failures in many different applications.
 

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Not to derail the thread, but has anybody used this on a 57 with any success? I have a 45 HD and trying to get a feel for how versatile it will be before I start thinking about another suppressor.


Sent from my iPad using Tapatalk
I've fired about 30 rounds with my PS90 using my Octane 45 and the fixed mount adapter. It shot fine and seemed to have minimal blowback. It also seemed quieter than my Spectre II, hard to know for sure since I was at an indoor range.
 

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Discussion Starter · #19 ·
How hot is hot, hot?

I do have an infared them gauge and never bothered to test it, I generally dont run it hotter than the spit test of having it sizzle off instantly.
 
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