RAW Rapid HM1000x SSG Set Up

[Slyde]

I will TRY to keep this short.

I am trying to set up a SSG on my .30 HM1000x, I’m just doing it for the heck of it. I am using the stock spring right now. Last night I set it up shooting ~900 FPS with the AEA 45’s. It was roughly 70* with a bit of humidity. This was set up with a .050” SSG gap. The intent was to shoot it today trying small HST settings to see how it would shoot.

Today it was 80*(90* where I was shooting from) with a bit higher humidity. I started with the AEA 45’s. It was shooting 956-963 FPS. I could not back the HST out enough to get the speed to change before the HST was hitting the stock(I know this isn’t the correct approach to tune but I was experimenting).

I tried shooting the AEA 50.5’s and the were around 898-900 but the balance of the HMx was off and it didn’t shoot them well. Didn't seem able to tune it effectively.

I tried some Zan 50.3 and they were 950’s also and didn’t shoot particularly well.

Any idea what may have happened? Can 10* to 20* increase and higher humidity make this kind of difference that can’t be tuned out with HST?

Any advice appreciated,
Brian

 

[Motorhead]

Sounding like you need to start clipping spring coils as with the springs greater preload when contained within a SSG devise it is over driving hammer.
SSG's don't offer broad tuning, but do offer very consistent & low ES shots when calibrated correctly.
Reg Pressure, Hammer weight & stroke, Spring rate of the SSG assembly all need to be adjusted / corrected to have the PCP operating at a specific output being caliber & projectile weight specific.

 

[Slyde]

Thank you Motörhead. That all makes sense.