advice needed please

[nigel]

Hi Gents
Have a slight problem with my BSA R10 Mk2. Low power.
I did have a leak on my xtx Huma reg, which after ordering a seal kit, have fixed.
Changed pelets from bisley mags to Diabolo express.
Run the pellets through the chrono (F1) and the power is 737.2 which equats to 9.49 ft/lbs.
I have tried to adjust the power by the hammer spring but the max I can get it to is 752 which is 9.88 ft/lb. I can wind it a fair way in but it will not change.
Have I done something to the regulator, I was very careful, using a vernier when reassembling it after the seal change to get it correct.
Before the leak it did run at 11.2ft/lb.
thanks an advance

[bullcelt]

chrono it with bisley mags its most likely the pellet change.

[DM80]

Sounds like pressure is to low

Dave.

[nigel]

Sounds like pressure is to low

Dave.

Hi Dave.
Thats what im thinking. Maybe adjust reg slightly, then put hammer spring adjuster back where it was and start again.
thanks

[nigel]

Just in case anyone is interested, i think i have sorted the problem.
I have taken the regulator out and turned the adjustment screw 1/4 of a turn anti clockwise.
I then put the hammer spring back to where it was and then ran some tests.
With Air Arms Diablo Express , weight 7.87, they are now running between 11.04 ft/lbs and 11.22 ft/lbs. This was with 10 shots.
With Bisley Magnums, weight 10.6, they are now running between 11.39 ft/lbs and 11.70 ft/lbs. This was with 10 shots.
Just need to see how accurate it is and how many mags I can get on a fill.
Thanks .

[Lavant_Lad]

Sounds like a good result.

[Tricky-Ricky]

The reg pressure obviously got changed when you dismantled it easy to do despite the measurement a reg pressure tester is really the only way to set it accurately but it sound like you have got it close enough.