mgnoco 1 Posted September 13, 2017 Report Share Posted September 13, 2017 Hi Guys I am new to the forum. I hope someone can explain whats happening with my S510 PCP. Essentially, if I leave the gun rest for a few days the zero is always off on resumption. Its always shooting about 2 inches low. But the confusing part of it is after 3-5 shots its nearly back at its original zero. Before I understood what was happening I was re-zeroing and then needed to re-zero again I use JSB Pellets which are very accurate once I get beyond the initial shots. Anyone experience this issue? 1 Quote Link to post Share on other sites
j j m 6,536 Posted September 13, 2017 Report Share Posted September 13, 2017 welcome mate Quote Link to post Share on other sites
Cliff Ray 185 Posted September 13, 2017 Report Share Posted September 13, 2017 Sounds like a valve not opening properly so giving less power to the shot. Then after a few shots it has loosened up. How old is it? Has it been "serviced" by someone who used the wrong lubricants? Quote Link to post Share on other sites
mgnoco 1 Posted September 13, 2017 Author Report Share Posted September 13, 2017 Thanks for that maybe it needs a service. Not sure of the age I bought second hand I would say no more than 2 years old. I didn't get any service on it and have it 12 months myself Quote Link to post Share on other sites
The one 8,467 Posted September 13, 2017 Report Share Posted September 13, 2017 Hello and welcome mate a bit of crap sticking a valve ??? Quote Link to post Share on other sites
mgnoco 1 Posted September 14, 2017 Author Report Share Posted September 14, 2017 Thanks for the advice guys. I'll try find someone to have a look. I'll keep ye posted. Quote Link to post Share on other sites
The one 8,467 Posted September 14, 2017 Report Share Posted September 14, 2017 dont think its the correct answer too over fill it and a couple of shots at over the power pressure and see if you can move the crap , sort the valve ? Quote Link to post Share on other sites
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