Avator, pioneer experience is guaranteed!A small gold miner camp/placer used to be just located down the hill in 1849. That is the only small patch of flattish land I have.If you are willing to take care of the coyotes and bears at night and the occasional mountain lions, we may strike a deal!For water, you may have to walk half a mile (up or down, your call), we only have 1 puny seasonal creek there.I can provide the shovel for the restrooms accommodations. lol
Fate, you told me to study the shroud of the Marauder gen 2. I haven't found anything about it with a cursory google search...
Okay, the new SRod baffle set...
Subscriber's posting of the Marauder's forward baffle array is just part of the gun's sound reduction system. That's just the part forward of the muzzle. The part behind the muzzle is just as important.On the end of the barrel's muzzle there is an air stripper with an O-ring on the front of it. The O-ring separates the shroud into two sections... the section forward of the O-ring and the section rearward to the breech.
The more effective the "air stripper", the more useful the shroud volume between barrel muzzle and breech becomes.
The problem with factory baffles is everyone makes the aperture holes to large to be effective.They do this to accommodate different calibers from .177 to .25 and to avoid baffle strikes.I made simple "cup" style baffles for my Fortitude with .257 aperture holes for .22 cal and used 4 baffles instead of the factory 3. The reduction in sound is super noticeable. The factory baffles have .315 aperture holes. Too large to be effective for a .22 cal.I also believe that smaller aperture holes create more back pressure making your shroud perform to it's fullest.
Barrel whip is pretty much a non issue in a low velocity rifle like a Fortitude. Theories are cool but nothing beats trail and error.
I was trying to inform myself in a generic manner, this is why I tried to avoid asking the question for a specific air rifle.I do not remember seeing internal shroud options from reputable vendors for external moderators. I thought it might be because external moderators can fit multiple barrels, whereas internal ones must be specific to one barrel, but it might also be because they are a bad idea for plenty of reasons unbeknownst to me. Hence my post on the forum.Right now, I am looking for a solution for an Avenger in .22, but the issue will be the same for my teenager son's choice for a pcp (undetermined at this point, he doesn't even know about it yet), as well as my future, high end leaning purchase, if I still take as much pleasure in shooting in a year or so.Do I make more sense that way?
John,You are correct that less clearance between baffle hole and pellet is more effective at trapping sound. However, when the clearance becomes too small, the reflected pressure waves inside the bore of the baffles starts to force the pellet to follow the axis of the holes through the baffles. This is of no consequence, if barrel bore is concentric to its OD; and there is minimal slop between the ID of the shroud, the baffles and barrel support (air stripper OD). When any of the latter are off center by small amounts, then there is a risk of pellets being driven off the bore axis. If the baffle holes don't line up with each other very well too, then the pellet suffers several "course corrections" before it has left the shroud (if the bore clearance is tight). Often this has a tendency to push groups off from the neutral sight setting.Consider barrel and shroud vibrations before the pellet has exited the shroud. If the baffle hole clearance is too small, the POI becomes more sensitive to relative movement to the pellet due to this vibration. Then there is the risk of clipping....So, manufacturers keep the cost down, to provide you with an "accurate" airgun that is a few dB louder, than could be achieved producing a quieter but "less accurate" airgun for the same amount of money. Cheap accuracy is what the market wants...