Ghost Ghost HP .22 Light Hammer Spring - TUNE TRIALS

[Solo1]

Take your time it will work out.

 

[IRBent]

Take your time it will work out.

Yeah, that's pretty difficult for someone who is OCD, ADD and wants er'thang RIGHT NOW!
I like the convenience of the pocket Chrony and its ability to keep data, even if it's @ 1% off. I also like to tweak . Knowing me I'll eventually buy that $40 minimum order of springs and buy several in each weight range between the Light and Heavy springs, and maybe even a few lighter than Light. So far all I've done is track velocity ranges through the power wheel with various weight pellets and slugs. In the end what will matter most to me is which ones will hit the target reliably and predictably. I know most lean with the MRDs but I've had really good groups out of the 18gr pellets. Then too, it only stands to reason I'd have better luck with them since I've not shot the MRDs but a few times.

 

[Solo1]

I know what you mean. When i first started to tune mine for 13 gr i was tempted to buy $40 worth too but once i got it shooting consistently i thought why fight it it shoots great leave well enough alone. Thats why i haven’t bothered with slugs much cause it just shoots so good that I don’t want to mess it up! This winter i might just buy 1.1 wire springs and play more. It would be nice to just change the spring and go from a ft setting to a slug hp setting

 

[IRBent]

I know what you mean. When i first started to tune mine for 13 gr i was tempted to buy $40 worth too but once i got it shooting consistently i thought why fight it it shoots great leave well enough alone. Thats why i haven’t bothered with slugs much cause it just shoots so good that I don’t want to mess it up! This winter i might just buy 1.1 wire springs and play more. It would be nice to just change the spring and go from a ft setting to a slug hp setting

I measured the weight (lbs per inch) rating on the Light and Heavy spring with a somewhat crude but most likely close to accurate method using fish weigh scales. If you decide you want to play with various springs, hit me up and we'll look at what's available vs the near known and share the burden. After all, $40 or so plus shipping is easier split 2 ways. Maybe someone else could be interested too. As for what little testing I've done, the heavy spring gives me good SDs and velocities from 18gr to maybe 23gr slugs, including the 25.4gr MRDS. But I sure liked the quiet and tame shot cycle on the Light spring. I was thinking something between the two might be the best of both worlds, but I've not really covered tuning the light spring for MRDs yet. I remember losing velocity on them once I crossed 108bar, but never tested 115 or more. Tossing in the O-ring spacer did give me more velocity but I think it hurt my SDs, most likely because the o-ring squished differently from shot to shot.

 

[tec]

When the reg is low it doesnt matter how hard you hit the valve (hammer spring tension). The power output limiting factor is the low reg pressure.

With my "tune" in the .20 I can get a 300fps spread with just the MIN and MAX on the power wheel. But I'm running @ 140 bar. Penalty to going this route is that a cold reg shot is bout 40-50fps slow.

I think this is due to the regulator creeping when idle...I have the Sekhmet on my Regulator, set for 2900 psi (200 bar) and it will creep up to 2980 ish after several hours of non use....and to your observation the first shot or two is lower velocity for the same Power Wheel setting, but then levels out at ~2900 psi as long as I wait ~25 seconds for the plenum pressure to recovery fully before launching another one...otherwise with the lower plenum pressure the velocity increases. The Sekhmet also registers ~35 psi drop in plenum pressure for each shot, prior to recovery.