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is it the seals
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kruzaroad View Drop Down
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Posts: 1714 		Post Options Post Options   Thanks (0) Thanks(0)   Quote kruzaroad Quote  Post ReplyReply Direct Link To This Post Posted: 12 Aug 2022 at 11:54pm
I'm pretty sure it's not deforming as I check it's sitting below the edge of the barrel, but I have a little pusher thing that I can seat it in further with so I'll try that tomorrow too double check. The seal is on the receiver side (model is roadster)
guns going to get stripped,internals cleaned, polished,resealed,relubed put back together making sure it's all tight and working well. Sighted in at 10 then 26 meters on open sights, if still playing up after that cut losses won't waste any more time on it.
Lots of ppl who's gamo work great for them, I may have just got a bad gun/model but hopefully just wants some tlc.

Edited by kruzaroad - 12 Aug 2022 at 11:55pm
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Billbobnz View Drop Down
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Posts: 783 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Billbobnz Quote  Post ReplyReply Direct Link To This Post Posted: 12 Aug 2022 at 11:22pm
You probably have checked the breech seal? I can't remember if on that model the seal is on the piston side or the barrel side?

I've removed the mag on a Gamo before too, too many problems of jamming. Try what Merces says and push the pellet into the barrel, as he says if the pellet sits proud when you close the barrelt this will stuff the end of the pellet skirt and cause problems. Just make sure they are pushed in the same distance everytime and re shoot through the chrony and see if the fps spread tighten up

If not wait till the new piston seal comes.
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kruzaroad View Drop Down
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Posts: 1714 		Post Options Post Options   Thanks (0) Thanks(0)   Quote kruzaroad Quote  Post ReplyReply Direct Link To This Post Posted: 12 Aug 2022 at 1:54pm
Cheers. The rifle has been very problematic. I voided the warranty ages ago when I removed the mag due to pellet deformation . So that is out. I check the pellets are seated in far enough every shot. When I removed the piston it wasn't that great looking, so I think the crossman oil every 250 shots is something I'll start doing after the seal replacement. Due to fact it will group for x amount of shots, I don't think it's the scope,as it will start regrouping again without adjusting the scope (deviation is way to much from aim point to be just my shooting and wind. I've looked at that. Blame shooter first and work back from that) and Ive lock tighted the screws they haven't moved. The info the red dot is awesome, Ive been toying with the idea, as I'm going to turn it into the scrub gun/short range (if I can stabalise it) and keep the tx as a longer range rabbit Gun. Im stoked to know that the red dot is used by another shooter and will now look further into that option. Eventual I'll replace it and muck around with my shock gel and carriage idea.
So cheers appreciate the response.
Any one else with ideas or options I'd still love to hear them.
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mercs View Drop Down
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Posts: 244 		Post Options Post Options   Thanks (0) Thanks(0)   Quote mercs Quote  Post ReplyReply Direct Link To This Post Posted: 12 Aug 2022 at 12:16pm
That rifle seems to be problematic.

When in doubt I push pellets home with back of ballpoint pen to ensure not being deformed when closing breach.

i follow Crosman regime of 1 drop of silicon oil into chamber each 250 shots to keep seals healthy.
Please note for the high power modern springers I only use Silicone Chamber Oil NOT Pelgun oil or ATF.




I have successfully used dovetail to Picatinny adaptor rail ($30 -$70)and fitted Stealth red dot ($80) or Stealth Reflex ($150) to my IGT's.



I have fitted several new scopes to my fusion and it works well for a few hundred shots. When it eventually wanders quick tightness check of action screws and target using sights to confirms all is well.
Some of the Gamo IGT's seem to slam the piston into the end of the chamber more than others. I have never pulled one to pieces to investigate. I have been pleased with Gamo warranty response on the one occasion I requested a replacement so it may be worth asking the question.

The only scopes up to the task of my IGT's have been Gamo 3-9x40 and NS 3-9x40

cheers

GamoBlack Fusion .177
Pellet BrandH& N Match
Pellet typeBarracuda
Average fps783
Grains10.64
Grammes0.69
foot pounds14.49
Joules19.64
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kruzaroad View Drop Down
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Posts: 1714 		Post Options Post Options   Thanks (0) Thanks(0)   Quote kruzaroad Quote  Post ReplyReply Direct Link To This Post Posted: 12 Aug 2022 at 10:32am
So the gamo does some wonderful groups then impact Point goes astray. I've got new seals on the way but have just chronographed it. Seems a bit of variation to me.
What is the view of you more experienced technical ppl on this?
All pellets were weighed and sized.
high 694 low 650 Ave 668
shots all in 600fps last two didgets of numbers in order.
79,90,94,84,94,70,66,71,68,87,73,54,64,
58,50,68,59,68,55,60,64,65,56,57,62
Any thoughts appreciated.
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