I guarantee this airgun can shoot @ 12 fpe.
... you may need a longer softer spring.
Sadly,the gun gets to choose what it prefers.
Quote from: Marc In Iowa on September 17, 2019, 05:29:37 PMQuote from: JoeKool on September 17, 2019, 04:35:59 PMI believe you may have too much hammer spring tension for shooting the .177 GTO pellets, and possibly too high of a regulator pressure.I believe that is correct. I had a very nice phone call with Earnest Rowe about my tuning challenges.Bottom line:The Dreamline powerplant design is really meant to deliver more power than what is needed for 6.8 grain pellets (~12 fpe). DL more for 24-30 fpe.If I had chosen the .22 Dreamline, GTOs @ 900 fps is more like 21 fpe; a much better fit (as you know from your experience). I'm not wedded to shooting .177 and almost ordered the .22 DL. I should have. Now, I need to figure out my options.Try 60 to 70 bar regulator pressure, and back the hammer spring grub screw out like suggested above. I guarantee this airgun can shoot @ 12 fpe. Just needs the correct tuning settings. The Uk versions are doing it and the only difference between those and the USA models is the UK models don’t allow you to adjust the regulator. Also, the only difference in the .177 and the .22 model Dreamline is the barrel caliber and the pellet probe size. And of coarse the factory settings for those caliber differences.Ignore Gile’s silliness, but watch this video?
Quote from: JoeKool on September 17, 2019, 04:35:59 PMI believe you may have too much hammer spring tension for shooting the .177 GTO pellets, and possibly too high of a regulator pressure.I believe that is correct. I had a very nice phone call with Earnest Rowe about my tuning challenges.Bottom line:The Dreamline powerplant design is really meant to deliver more power than what is needed for 6.8 grain pellets (~12 fpe). DL more for 24-30 fpe.If I had chosen the .22 Dreamline, GTOs @ 900 fps is more like 21 fpe; a much better fit (as you know from your experience). I'm not wedded to shooting .177 and almost ordered the .22 DL. I should have. Now, I need to figure out my options.
I believe you may have too much hammer spring tension for shooting the .177 GTO pellets, and possibly too high of a regulator pressure.
What is the lowest BAR pressure that won’t exceed the set regulator pressure?
... what is better in terms of efficiency and consistency:1: higher reg with lower hammerspringShould i go to reg 140 and dail down the hammerspring2: lower reg with higher hammerspringShould i leave it as is
Quote from: Floris on January 07, 2020, 05:27:54 AM... what is better in terms of efficiency and consistency:1: higher reg with lower hammerspringShould i go to reg 140 and dail down the hammerspring2: lower reg with higher hammerspringShould i leave it as isThis YouTube video by FX's Ernest Rowe (probably applies to Dreamline too) seems to imply ...1. Set hammer spring setting to Max2. Set regulator for ~920 fps3. Back off hammer spring to 900 fps
- find a weaker spring and go back to medium port, lower the reg, find the knee