RAW POI Change After Moderator Is Removed and Reinstalled.

I don't have a RAW but I have seen this on other guns. Can't offer a solution or explanation unfortunately!

Thurmond 

I had a similar problem on a fx. If the pellet doesn't go centered though the moderator it can push the pellet around . If you move the moderator to a different spot the pellet will be going through the moderator different. The pellet should go through the exact center. The smaller the hole in moderator the more critical being centeted is. Several reasons cause this issue. Barrel not straight, bore not in center of barrel, moderator not straight,a bad crown,threads on end of barrel not straight and probably more issues that i have not mention. Try shooting without moderator and see how much poi changes. 

It doesn't have to hit the moderator, just be off centered and real close to hitting. 

It's pretty normal for removing the moderator/lead dust collector and cleaning the barrel for the poi to change. It has to do with messing with the harmonics and the uneven material when rotating and tightening down the threads, as people are not perfect in making these things. Try marking the moderator with a line, and making sure you line it up in the same spot when putting on your moderator. If you suspect your pellets are clipping then using a file to enlarge the openings help. Although if your pellets are clipping then you would not be able to hold a decent group.

I'm ordering my HM1000x .357 Wednesday morning and I'm going to ask Sandra about this, Thanks for the heads up...

"FukoChan"It's pretty normal for removing the moderator/lead dust collector and cleaning the barrel for the poi to change. It has to do with messing with the harmonics and the uneven material when rotating and tightening down the threads, as people are not perfect in making these things. Try marking the moderator with a line, and making sure you line it up in the same spot when putting on your moderator. If you suspect your pellets are clipping then using a file to enlarge the openings help. Although if your pellets are clipping then you would not be able to hold a decent group.

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This is normal behaviour with pcps, and im guessing powder too. Just how the harmonics affect your barrel / rifle. Just rezero and carry on. 

So how exactly did you remove the moderator? Do you have any photos of what it looks like inside the moderator? I'm curious how it attaches and what it looks like inside of one...


Sean

Thanks for the info and the photos-that helps a lot! In the other 'RAW' thread, there is talk that Salticon will be offering a special version of the 'DonnyFL' moderator specific for the RAW's, soon (I believe?). That should quiet them down a bit too. I'm wondering how much louder mine will be going from .25 cal in 50 fpe up to .25 cal in 60 fpe? Additionally when I install the .30 cal barrel setup on it to. I'll have my answers tomorrow.

The only thing I'm not crazy about on the raw is the moderator. Seems like excessive engineering when a more conventional and simpler Weihrauch or Hogan silencer would do. But with the RAW's inherent accuracy Martin probably has his reasons.

"Dirte"

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Here is a picture. Just unscrew the cap and the tube slides off. Takes about 10 seconds. The HMX .25 is quite a bit louder than the HMX .22. I tried to sleeve my .25 with some high density foam mat. It did not change a thing. I'm surprised they are that load being that long, but it is what it is!

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I wonder if the material you pack in there makes a difference? Take a look at the following instructions from the DonnyFL website:

https://donnyfl.com/pages/felt-how-to

Sean

There is a lot of leverage at the end of the barrel that is held on in one spot on the receiver. A very small change at the end makes for a major change at 40-75 yards or what ever distance you are shooting.

I found that out the hard way when I got my cheapo but deadly accurate Gauntlet. As long as I don't touch the barrel once the POI has been scoped in, all is well. A tap on the barrel could change things big 40 yards out.

"The only thing I’m not crazy about on the raw is the moderator. Seems like excessive engineering when a more conventional and simpler Weihrauch or Hogan silencer would do:

It is a reflex design which keeps the over all length down. You could order one anyway you like. Martin does such fine bluing I still like just the blued barrel on them.

John

Yah. If I had it to do over I think I'd specify the standard sleeved barrel to retain rigidity, but sleeved all the way to the muzzle and finished with the standard 1/2" thread. I don't particularly like the carbon fiber look, but I think it is part of the RAW accuracy equasion.

My 25HM1000X has the offset CF. It disassembles easy enough but I have notice a POI shift after taking it off, not much but some. I would actually prefer the non-offset moderator. I've heard it's quieter than the offset. Even if wasn't any quieter I'd still prefer the more common smaller OD'd design.
Jimmy

I thought long and hard about going with the CFOS moderator vs the traditional 'centered' version and decided that I should stay centered. While it's only a 'theoretical' argument, the one point that I was hesitant about was the possibility of the uneven pressure expansion at the point when the pellet just leaves the barrel and before it exits the moderator. The other point was the easy of removal for cleaning. Now that I hear the DonnyFL version will be available soon, I'm glad to have stayed centered as it will give the look I prefer.

Other than those points, I think Martin's done a great job with the CFOS moderator-it looks really nice. He also told me there is literally no sound difference between the two designs.

I would certainly be interested in Donny's design if it is more compact than the standard RAW. I wonder, though, what he can do with the the 6" unsleeved portion of the barrel? 
Interesting question as to what exactly is causing the change in POI. Perhaps the carbon fiber silencer external shroud is not machined true on the ends and is pulling the barrel from straight as the cap is tightened?