BSA Ultra MMC in .177 unregulated. This one has the adult size stock. I was told its the Ultra/Scorpion model, but not sure. Around 36 inches OAL.
Tuned by Motorhead. Summary of the work he did is below.
FULL DISCLOSURE: This was shooting great a couple months ago around 9 FPE with low ES. Recently when I took it out to shoot, it was around 3 FPE and much larger spread. All the air is still in the tank and hasn't leaked, so not sure if this is a quick/easy fix just dont have time/patience. Selling as-is.
$300 and I pay shipping. PayPal F&F or add 3%.
Summary of work done by motorhead:
"....We went completely threw the action, resealing and setting up at greatly reduced power as requested. * As delivered 7.9 at @ 970 fps and requesting an @ 8 fpe tune being a 7.9 @ 675 fps.
To get power down that far and get any degree of velocity stability I had to make a custom light weight hammer core / striker. In making it also placed a PEEK strike tip on it so noise was reduced.
Poppet as well hammer got new springs installed for this Low pressure / low output tune. Did a bit of trigger work to smooth up and adjusted.
In my time shooting strings over the chrony found it not happy at 675 and much better running a tad faster in the @ 720-730 range being 9 ish FPE.
Running W/O a regulator at this power has the action ONLY BEING FILLED TO @ 120 bar and can shoot down to @ 70 bar having an ES of just 12 fps
* Fill to @145 bar and shooting down to @ 62 bar has an ES of @ 40 fps.
If or when you install a regulator ... set it to @ 1200-1300 psi or @ 85 bar.
....
Installed the provided HuMa Fill / gauge assembly.
Tuned by Motorhead. Summary of the work he did is below.
FULL DISCLOSURE: This was shooting great a couple months ago around 9 FPE with low ES. Recently when I took it out to shoot, it was around 3 FPE and much larger spread. All the air is still in the tank and hasn't leaked, so not sure if this is a quick/easy fix just dont have time/patience. Selling as-is.
$300 and I pay shipping. PayPal F&F or add 3%.
Summary of work done by motorhead:
"....We went completely threw the action, resealing and setting up at greatly reduced power as requested. * As delivered 7.9 at @ 970 fps and requesting an @ 8 fpe tune being a 7.9 @ 675 fps.
To get power down that far and get any degree of velocity stability I had to make a custom light weight hammer core / striker. In making it also placed a PEEK strike tip on it so noise was reduced.
Poppet as well hammer got new springs installed for this Low pressure / low output tune. Did a bit of trigger work to smooth up and adjusted.
In my time shooting strings over the chrony found it not happy at 675 and much better running a tad faster in the @ 720-730 range being 9 ish FPE.
Running W/O a regulator at this power has the action ONLY BEING FILLED TO @ 120 bar and can shoot down to @ 70 bar having an ES of just 12 fps
* Fill to @145 bar and shooting down to @ 62 bar has an ES of @ 40 fps.
If or when you install a regulator ... set it to @ 1200-1300 psi or @ 85 bar.
....
Installed the provided HuMa Fill / gauge assembly.