Need Advice on a new Moderator for my Crown
- Thread starter mtnGhost
- Start date
I don't have mine on my Crown, but on my .25 Vulcan Tactic gen4. I compared the Levitas (the smallest one) with the DonnyFL Tatsu. The sound reduction was very much about the same to the ear. The biggest difference is that the STO moderator weighs about 1/4 of what the DonnyFL weighs, and it costs about $30 less. I got mine with the stainless steel threads since I take it on and off every time I use the gun. They are so light that I thought my package was empty when I received it... And they look pretty bad ass to boot! 
Upvote 0
I totally understand. I've had to skyjack my scope up with Infinity rings for elevation canting, still have a piece of the 700mm barrel in focus under ~7x with only 12-15MOA.
They're both great in the 380mm though. Took these today..
Upvote 0
Hi folks, my .25 Crown Continuum is coming in soon and I am keen on one of these STO mods. I am wondering what folks who have them would recommend? mtnGhost, to me it sounds like you prefer the Mus overall, but do you find the diameter to be an issue in any way?
Thanks for the input!
Thanks for the input!
Upvote 0
None of the above. The Mus fell apart on me with the quickness, the Pilum was right in linr behind the Mus. It started with the foam rings near the muzzle that weren't held in place very well. I was getting POI shift, and longer version short - I saw the foam dampening material in direct line with the bore / path of the projectile. There was a perfect moon-shaped hole going through the foam, and at that point I confirmed where the POI shift derived. This was the case with both moderators.
I contacted STO via the forum where the presale was facilitated, explained the situation and everything that I had done up to that point. His response really pissed me off to be frank. He tried to accuse me of mishandling the moderator, and went on and on as if his design was perfect and I was some amateur. I did not care for the exchange one bit, I told him that he was not handling the situation well at all and I gave him one last opportunity to come correct. He wised up and offered me a refund. I didn't go through with it, because I just new that I would wind up coming out of pocket for the return shipping with nothing to show for it.
The bottom line with the Mus and Pilum (both "moderate flow") is neither could not hold up to my 60-62FPE 22 cal Crown. I told STO that I needed something that could handle upwards of somewhere higher. He declared that his design testing of these was performed with an 80FPE rifle, and that might be true for all I know, but the two I bought were rendered useless at my financial expense and my absolute frustration. For that, I rate them both
Upvote 0
I make my own silencers, but the one thing I have learned is, don’t trust carbon tube on high powered airguns! I don’t care who makes them or what the wall thickness is, carbon is brittle, the slightest knock or slight imperfections in manufacture can (and has) catastrophic failure. I had one blow up on a 60fpe .25. It didn’t explode on the first shot, or the second, it exploded after about a year and thousands of shots.
Imo carbon is good up to about 40fpe, beyond that is a gamble. I now make my high power mods from thin wall aluminium pressure tube or thin aluminium tube inside a carbon sleeve.
Edit!
Also, it the crown barrel liner assembly is anything like my impact then you will need to be aware of clipping. The reason being, the liner tension nut may not always align correctly with the bore of the liner, when the mod is screwed on, it could be on the wonk with the liner. On my .177 (4.5mm) impact, the hole in the endcap was 7.5mm because of alignment issues.
Bb
Imo carbon is good up to about 40fpe, beyond that is a gamble. I now make my high power mods from thin wall aluminium pressure tube or thin aluminium tube inside a carbon sleeve.
Edit!
Also, it the crown barrel liner assembly is anything like my impact then you will need to be aware of clipping. The reason being, the liner tension nut may not always align correctly with the bore of the liner, when the mod is screwed on, it could be on the wonk with the liner. On my .177 (4.5mm) impact, the hole in the endcap was 7.5mm because of alignment issues.
Bb
Upvote 0
Bb,
I also build my own moderators. I never use sound absorbing materials inside. They don't last and they do nothing for sound. I use inverted cone baffles. With my design, the component alignment is provided by the outside tube itself. Component placement is accomplished by tubular spacers installed on 3 equally spaced small diameter compression rods threaded into the rear end bell. Belleville washers are used on the rods to apply baffle compression force and 3 SS Crown nuts are used to Clamp the whole assembly together. I have always made these with 6061-T6 aluminum, but I was going to make my next one from CF to save weight. Your experience with CF gives me pause though. My current design is a product of evolution over many years. It really works well and is very quiet. I had the same concerns about barrel to moderator alignment, so I ordered .250" precision shafting and ground the shaft to the barrel end diameter, which is necessary to compensate for the Crown's barrel choke. I then use the shaft to extent the barrel line through the moderator to make certain of correct alignment every time I remove the shroud and barrel for service. This assures perfect alignment every time.
In my experience, the sound emitted with a moderator will contain a "Thump" element. This is caused by the moderator tube itself when it gets pressurized. This thump sound can be reduced by wrapping a rag on the moderator loosely and by increasing the rod compression force used on my 3 compression rods. I think the pellet itself is noisy. The "crack" sound element actually comes from the pellet itself and no moderator can stop that. It isn't that loud anyway, but with my moderators it is totally absent if the gun is fired without a pellet.
Upvote 0
A bit late to the conversation I know but I had to toss my sauce into the arena. I put a Sarissa on my Aselkon MX9 and after the initial change in POI (easily accounted for) I was able to consistently put in excellent groups at 35 and 50 yards. Naturally the extra weight on the end of the barrel means a change in POI from the sight-in done prior with no moderator -- that's a given and I was prepared for that. But what I was unprepared for was the change in tone and volume of the report of my rifle. I'm not going to go so far as to say it was church-mouse quiet but if I were to miss my prey at 25 yards (and further) that target would hear a puff that might cause it to look around a bit for the source but by that time the follow up shot would have things pretty well settled. The quietness achieved with my rifle was frankly astonishing. I'm looking forward to attaching one of these to my Puncher Breaker, my Rotek, and my Blitz. The only thing I was not prepared for but was really not an issue for me was that it fits great on the end of my barrel but the different shrouds require a different adaptor to get them to fit and work with those shrouds. Again no big deal I can find those online without much fuss; I was just under the impression that it was a one-off solution when choosing my thread. That's on me and I own that. Never-the-less I'm extremely happy with the result. No doubt I'll be getting more.
Upvote 0