FX Trying to hit ~900 fps with .22 Dreamline and 18 grain pellets

[OatmealMu]

Here's the deal: I have a .22 Dreamline Classic with a 500mm barrel. The regulator is set at 100 bar. I'm shooting 18 grain pellets and would like to get near 900 fps. I suspect I'll need to slow things down to achieve optimal accuracy, but I'd like to hit 900 to give myself more space to work. I should be able to reach these speeds, right?

I did the whole rigamarole with adjusting the hammer spring tension and regulator pressure. Even with a nearly maxed out hammer spring at ~115 bar, I'm only getting a very erratic 870 fps. Am I asking too much of the 500mm barrel? I'd like to maintain a decent shot count, so I'm trying to avoid high regulator pressure.

Ideas?

 

[L.Leon]

These are the numbers on my Ghost XR as received… sending the same 18s as you… 17” barrel.

JSB Exact Jumbo 18.13 @
902 FPS avg.
900 min. / 905 max.
Spread 5
Standard deviation 2
Regulator @ 100 BAR / Power Wheel on 10

 

[cahil_2]

I put a huma reg in mine set to 125 and I get 890 max.

 

[huntr]

Bone stock .22 Dreamlite, 500mm, reg. @125, PW-Max (old style 1-5, Max, A-E, Min), TP- High, HN Barracuda 18.2gr., 905 fps, 10 shot avg.

 

[Blejda]

I have reg set at 105 bar and 18s are going 900.
If you have early Dreamline your reg would need to be set around 130 bar because of smaller plenum.
Regards Marko

 

[Headshots]

The stats from fx dreamline classic are

Adjustable match trigger

VELOCITY 4,5 (.177): 295 m/s • 940 ft/s
5,5 (.22): 280 m/s • 920 ft/s

6,35 (.25): 270 m/s • 890 ft/s

7,62 (.30) TBA

You should be able to hit 900 . But , is the harsher shot cycle be worth it ? There's nothing wrong shooting 18s at lower to mid 800s . It would probably shoot the 16g Hades with excellent accuracy. FX could probably get you back to a better tune if all else fails.

My .22 Maverick is putting out 50 fpe at just over 100 bar.

And for 2x the price you could own one like Leon's , if more weight is OK.

 

[OatmealMu]

I have reg set at 105 bar and 18s are going 900.
If you have early Dreamline your reg would need to be set around 130 bar because of smaller plenum.
Regards Marko

I purchased it new earlier this year, and it looks to be the latest revision. I should also mention I have a second Dreamline that shoots 900 just fine. Out of curiosity, I tried swapping the entire air tube assembly from the second Dreamline to this one. No change, which makes me wonder what else could it be. Could the valve be the issue?

 

[Blejda]

Maybe your reg gauge is not accurate.
Try raising reg prresure for about 10 bars and adjust hammer spring.Also try power adjuster on level 2 and 3.
Sometimes transfer port on 2 gives more power than 3.
Regards Marko

 

[EnricoStrydom]

Maybe pull your barrel and check - mine has a smaller transfer port (for pellets) hole on one side, and the larger hole with the small bar (for slugs) on the other. Maybe yours is on the "pellet" port, and flipping it 180 gives you the larger port?

 

[csdilligaf]

I was getting aroung 890 fps w/18gr JSB and want to get a little more so just ordered the Power Plenum. I have it apart right now but I think the reg was set at 110 bar. Will let you know how that works out.

 

[Joedirt199]

Yup I would check the transfer port on the barrel and use the slug one if you have it. On high transfer setting and 100 bar I am getting 920 fps on max hammer spring setting. I then back the hammer spring down to 880 fps which was C or D, I think. I do have a power plenum but should be plenty doable in the classic gun configuration.

 

[csdilligaf]

Installed my power plenum on a Dreamline Classic 500mm set reg at 120 bar and got 970 fps with 3 spread with the JSB 18.1 now I will work on a tune for accuracy and drop the fps a bit.