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Moderator clipping question

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Blueduck

Blueduck

Member
Dec 6, 2022
86
130
Redding California United States
Hello friends,

I suspect I have a clipping issue on new 600mm barrel setup. Mod is a Donny FL Ryu .22 with QD mount. The mod and mount were on my FX dreamline 500mm .22 and zero issues over 750 shots. Bought a 600mm .22 barrel for the same Dreamline and trying to shoot light slugs. Slugs are flying in crazy clockwise arc and hitting low. Without the moderator I can now get some groups. I have taken the moderator apart and closely inspected everything. Will there be visual evidence of "clipping"? What am I looking for? Thanks.
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It honestly doesn't look like it grouped any better without the mod. Just more shots in that group. The overall center to center spread looks the same +/- as the 3-4 shot groups. I'd say it's probably the slugs, because those are very loose groups for 35yrds. Someone with experience with that gun and slugs could definitely help you more than myself. The mod on the barrel will often shift your POI lower.
 
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Blueduck said:
Hello friends,

I suspect I have a clipping issue on new 600mm barrel setup. Mod is a Donny FL Ryu .22 with QD mount. The mod and mount were on my FX dreamline 500mm .22 and zero issues over 750 shots. Bought a 600mm .22 barrel for the same Dreamline and trying to shoot light slugs. Slugs are flying in crazy clockwise arc and hitting low. Without the moderator I can now get some groups. I have taken the moderator apart and closely inspected everything. Will there be visual evidence of "clipping"? What am I looking for? Thanks.
View attachment 556639
Click to expand...
What liner are you using?

With the superior 600 .218 HN HP 21-23, same for Zan and best of all griffin .218 should be packed into one ragged hole or roughly .5"cloverleaf
never tried .217 with the FX .22 liners because i had such fantastic results with the .218 or .2175.

Do you have the STX style liner lock or the Superlight barrels?

IS there a nut on the front you have to loosen in order to pull the liner, or must you remove the shroud and loosen a locknut on the shroud/Barrel connector?
 
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RabbitofCaerbannog said:
What liner are you using?

With the superior 600 .218 HN HP 21-23, same for Zan and best of all griffin .218 should be packed into one ragged hole or roughly .5"cloverleaf
never tried .217 with the FX .22 liners because i had such fantastic results with the .218 or .2175.

Do you have the STX style liner lock or the Superlight barrels?

IS there a nut on the front you have to loosen in order to pull the liner, or must you remove the shroud and loosen a locknut on the shroud/Barrel connector?
Click to expand...
It is an STX
 
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Blueduck said:
Hello friends,

I suspect I have a clipping issue on new 600mm barrel setup. Mod is a Donny FL Ryu .22 with QD mount. The mod and mount were on my FX dreamline 500mm .22 and zero issues over 750 shots. Bought a 600mm .22 barrel for the same Dreamline and trying to shoot light slugs. Slugs are flying in crazy clockwise arc and hitting low. Without the moderator I can now get some groups. I have taken the moderator apart and closely inspected everything. Will there be visual evidence of "clipping"? What am I looking for? Thanks.
View attachment 556639
Click to expand...
I might suggest increasing your reg pressure. 150 bar seems to be a reoccurring theme in fx guns for me. My stock 25 dreamline on pellets is at 150, so is my turned up 22 impact that likes 23g and 34g within that tune . They just ended up liking that pressure for the type of tune I was looking for and precision .

2 other friends mavericks and dreamlines are around there too. Light slugs and pellets.

Standard liners have a tighter choke and have tended to favor smaller diameter and softer alloy slugs ime.
 
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RabbitofCaerbannog said:
Stx superior can shoot lighter slugs really well in .22 17-21 gr. can shoot fantastic .218 Slug hp, griffin LDC .218, and NSA 17.5 .2175

if It’s an stx barrel version I have no idea. I’ve only ever had super light barreled dreamline and crown
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I own one. They do till they don't. 23 gr 217 javelin is where mine stopped playing. My choke didn't like Nielsons alloy. I'm also asking 150 yards minimum precision.

If you go heavy liner, they typically won't like pellets beyond monster redesigns in my experience. I'd try just more pressure before spending a cent on anything or changing parts tho.
 
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6gun said:
I own one. They do till they don't. 23 gr 217 javelin is where mine stopped playing. My choke didn't like Nielsons alloy. I'm also asking 150 yards minimum precision.

If you go heavy liner, they typically won't like pellets beyond monster redesigns in my experience. I'd try just more pressure before spending a cent on anything or changing parts tho.
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I meant to respond to OP. But i never went above 21gr with it. 19gr griffins were good, 21 hp were fantastic. 17gr griffins were best for me. the 17.5nsa was the ONLY one. back when they made half sizes this was the old alloy.

I wasnt recommending new hardware. I asked him what slug. Its probably the slug. 218s worked better for me. and yeah I'd bump that number up to 130bar and use the lowest power wheel setting/ lowest Internal hammer spring setting that provides the desired velocity consistently. Classic High pressure, low dwell. Should work well. The reason i asked whether he had superlight or normal was sometimes the Liner lock on the superlight can be slightly too loose and allow a tiny bit more barrel (liner) wobble than it should.
 
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Thank you all for the feedback! The slugs I tried were Javelin 23 grain .217 I did quite a bit of research and found people had success with those in .217. I tried testing them from 850 to 975 fps and with different reg pressures, (100 to 150 bar) with & without barrel band, barrel band position, hammer weights and preloads and found my best results at 920 fps. BUT...that was like a 1 inch group at 35 yards. I flipped the port around last night and I am going back to pellets for now. The ground squirrels are already starting to eat my chicken feed! 🫤 Thanks again for all the insights. It's interesting how a tune on the same exact rifle in someone else's hands can produce drastically different results. I may try some different slugs after my pesting season 🤔
 
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"It's interesting how a tune on the same exact rifle in someone else's hands can produce drastically different results" Airgun VOODOO! I used to get frustrated with the idiosyncrasies of our equipment but now it fascinates me. It's NOT like dealing with the simplicity of powder burners but it's just ONE of the things that makes airguns so interesting (to me).
 
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Blueduck said:
Thank you all for the feedback! The slugs I tried were Javelin 23 grain .217 I did quite a bit of research and found people had success with those in .217. I tried testing them from 850 to 975 fps and with different reg pressures, (100 to 150 bar) with & without barrel band, barrel band position, hammer weights and preloads and found my best results at 920 fps. BUT...that was like a 1 inch group at 35 yards. I flipped the port around last night and I am going back to pellets for now. The ground squirrels are already starting to eat my chicken feed! 🫤 Thanks again for all the insights. It's interesting how a tune on the same exact rifle in someone else's hands can produce drastically different results. I may try some different slugs after my pesting season 🤔
Click to expand...
i gathered results from a crown 22/700 superior, 380 and 600 superiors from a notos, 600 Dreamline tac and DRS 700. Superior and heavy

17-21 gr 218s constantly gave the best results. If you want I have a surplus of .22 217 21 gr HP slugs. I. Can mail you 50-100 to experiment with no problem. 21 may work better than 23 if you’re wanting to stick with 217. But my suspicion is .218 will work a good bit better
 
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Just shot a mag of JSB jumbo18.13s for the first time. Left my last tune from my slug experiment, slid on the barrel band and the Ryu moderator and averaged 960 fps. Most flew through the center knocked out area! Now this I can work with! Didn't even touch the scope yet. Must have been the slugs before 😅
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