Matador shroud vent mod=quieter
Ive been shooting my new R3(new reg version) 25 cal Long and cant help but notice the distinct blast of air out of the vent holes.
My R3 22 Long air release is barely felt or heard,but this 25 is blowing hard puff of air and the sound is definitely noticeable(mostly what I hear on shot).
The vent holes are same size on both shrouds as shrouds appear to be same( standard interchangeable part)
I know the 25 is pushing considerably more air and am wondering if slightly larger holes or more would be more efficient to venting additional volume(allowing pellet to leave baffle in a vacuum,increasing accuracy ) as well as larger/more holes not increasing velocity of escaping air(less noise).
After all compensators on PBs get more or bigger holes as caliber/power goes up.
Thoughts anyone?
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Donny, If the scotch pads and too tight, “and or” take up too much room, you will have taken up all your expansion space. Which equals no shroud area at all. Nor will the pressure wave be able to get to the holes you drilled. I would use very little, and only slightly wider in width that the area the holes are drilled in. And LOOSE!!! 😉
Also, you can find a scotch pad that has no grit embedded in it if you shop at places like dollar stores sometimes. The real deal has grit in it which can find it’s way into the barrel. Not good, not good at all. Even the green, which is the finest grit that scotch makes, is very coarse.
I have roles of professional grades here some where that are purple= cores, Brown, courser yet, Grey, fine grit and white that has a polishing powder in it. But all of them have some grit. I used these for Alu. cylinder head porting for drag cars. It comes in large roles. You can find it at ENCO and MSE machine tool supplies.
The off brand pads have none at all. 😉 Sadly, I am just about out of the fake pads. 😥 The last I bought I found at a Flee Market.
I know Ernie at Swift uses the grey colored ultra-fine Scotch-Brite, for the port hole baffling. If you go to an auto body supply shop you can buy the red, grey, or green.
I think your approaching this entirely from the wrong direction. I looked at the schedule around Orlando coming up and Flaming Lips (psychedelic band) is playing. I guarantee after that you’ll think the .25 is nice and quiet. 😛 (if you can hear it at all)
Anybody with a .25 STD that had any success with the vented hole mod?
Even in my backyard the muzzle report with fence close by is noticeably louder than when out on farm in
open area.
Ok I just got back from the shooting range and have concluded that this mod does not work for the .25 STD. I drilled two rows of holes with 3/32 drill bit and also drilled out all the holes in the baffle nut with the same bit. Was able to stuff the green scotchbrite pads into the shroud around the barrel. It was still wicked loud while shooting pellets. Gabe is shooting his gun tomorrow with the NC shroud attached, I’ve asked him to record a video of it for me so I could hear the difference a NC shroud could make.
Anybody with a .25 STD that had any success with the vented hole mod?
Even in my backyard the muzzle report with fence close by is noticeably louder than when out on farm in
open area.
That, and I can’t help but wonder if it can be bad for the valve to shoot it without a pellet. I know it can cause real problems with the Rapid, and the FX guns dry-fireing them. Not a good thing to do with some BSA’s if recall correctly. Just to be safe, I wouldn’d do it.
Might ask ED what he thinks.
Knife
I clearly missed the dry fire. Donny-WTF ??? Of course it will be loud.
Even in my backyard the muzzle report with fence close by is noticeably louder than when out on farm in
open area.
Donny, an unloaded Edgun is MUCH louder than when loaded and shot.
Now, I don’t suggest you shoot a loaded Edgun in the house, but be aware the pellet has a delaying effect on how fast that air pressure can vent.
You have enough holes, now just find a filter material that sorts it all out
H 😯 😯 t
Hmmm. More holes but in front stripper. Where’s my drill press??
This is somthing I am sure none of you will want to do, unless you can pick up a spare tube to try it on.
I saw on the earlier shrouds sold by AOA from England, called the Huggett. They had vents in the front of the shroud.So what the heck, I tried it.
Doesn’t seem like it should work, as it effectively does away with the last two baffels.
Well, after it did this, it did get quieter,and the sound was lower, or less high pitched.
Just to make sure i wasn’t hearing wrong, I wraped the shroud with good old fashion duct tape, and then fired it with and without. It was much quieter without the tape. I have no Idea whay it works so well.
I have stainless steel screen behind the vent holes now. This made it even quieter.
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The tattoos and piercings are just souvenieirs. It’s all about the pain.
If I had to guess what you look like in person Dennis, this is what I picture:
There’s some space left, give me another row!
The 25 moves a lot of air that needs to be diffused. I can tell you with absolute certainty the muzzle on my modified 25 ended up as loud as my 22 was stock as I did the comparisons side by side as I was modding 25. Both were shooting at 885fps.
After I was happy with 25 I modded 22.
The scotchbrite pads I get from body shop are appx 1/4″ thick and are a snug fit. With the standard you have around 5.5″ IIRC less rear shroud to vent/muffle into. If it were me I would go for a 3rd row possibly a 4th in rear shroud.
The 25 moves a lot of air that needs to be diffused. I can tell you with absolute certainty the muzzle on my modified 25 ended up as loud as my 22 was stock as I did the comparisons side by side as I was modding 25. Both were shooting at 885fps.
After I was happy with 25 I modded 22.
Another theory, the felt piece was not thick enough to slow down the air coming down the shroud. I was able slide the felt sheet in easy. So I went back to Demp’s original idea of scotchbrite pad. I cut out the 2×3.5 inch that he suggested. Instead of trying to shove the whole sheet down this time, I the sheet into 4 pieces of .25/3.5. It was a lot easier to push these pieces down. The Scotchbrite is thicker and fills up all the space between the barrel and shroud. Will fire it tomorrow morning to see if this works.
I drilled all the holes out on the front stripper as well as few more holes in additition to second row on rear shroud.
I’m sure the long version will be quieter but you should hear a noticeable drop in muzzle report regardless.
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Donny, too much of a good thing is not always a good thing.
Easy test. Put some duct tape over the holes at the top and over the second row of holes at the bottom, just allowing one set of holes. See if that does not improve your sound signature. Holes are easily fixed by pushing epoxy putty through them from the inside and sanding it smooth on the outside after it dries. The Edgun barrels are easily painted with a flat black paint of good quality. You’ll never know they were there.
The best solution for me has been the CF shroud, with the additional screw-on can at the end. Until someone comes out with an oversized diameter shroud, that’s going to be the best answer. The vent solution reduces the problem, but does not solve it for everyone.
Hoot