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Gas Piston instead of a spring?  

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eddieirvine
(@eddieirvine)
Joined: 11 months ago
Posts: 21
2019-07-29 17:31:01  

Question for my friends here, i bought a gamo swarm to have in my shop for ground squirrels, i have a couple of  pcp short guns i fill with high pressure air and like them very much, just thought i would use this and keep it in my shop for cheap shooting. the scope that came with it the cross hairs turned inside the scope and i knew it was a cheap scope, just thought i would try it out. so my question is with this nitro piston instead of a spring, do i need to buy a springer rated scope? Let me know if you get an extra minute and thanks


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Jim in SWMO
(@jim-in-swmo)
Joined: 2 years ago
Posts: 211
2019-07-29 18:50:15  

Whether it's a gas piston or wire spring both have the same 2-way recoil and it's that 2-way recoil that can kill scopes. So yes, you do need a springer rated scope for a gas piston gun.

"You've come far, pilgrim."-------"Feels like far."
"Were it worth the trouble?"-----"Ah, what trouble?"


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ekmeister
(@ekmeister)
Member of Trade
Joined: 2 years ago
Posts: 439
2019-07-29 18:59:56  
Posted by: @eddieirvine

Question for my friends here, i bought a gamo swarm... the scope that came with it the cross hairs turned inside the scope...so my question is with this nitro piston instead of a spring, do i need to buy a springer rated scope? Let me know if you get an extra minute and thanks

I don't know that rifle, but the simple answer is...

Yes.  If it kicks like a springer, it's a springer, whether the spring is gas-powered or helical coiled-steel.  Your experience with the skewed crosshairs suggests that's what you're dealing with.

Some say they've found their scope-protective panacea in the Diana ZR scope mount.  But, since I've yet to try one myself--especially for the long haul--I still favor springer-suitable scopes for such applications.  I say "suitable" instead of "rated" because the latter are a promise on paper.  The former are scopes that have proved they can really take the beating for thousands of shots, have done so for many shooters (not just 1 or 2), and have still 'kept on ticking'.

As to the ZR mount, others may choose to weigh-in on it.  IMO and IME, the more testimonials we get, the more-inclined I am to trust it and give one a try.

Safe and Happy Shooting!

Ed, the Airgun TuneMeister

https://www.airguntunemeister.com/


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eddieirvine
(@eddieirvine)
Joined: 11 months ago
Posts: 21
2019-07-29 20:43:46  

 

thanks for the replies i was headed in this direction and figured the recoil was the same maybe a bit better. Well need to look for one, any others have a particular scope for them let me know.


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ribbonstone
(@ribbonstone)
Joined: 2 years ago
Posts: 231
2019-07-29 21:52:44  

HAve only tried two...but maybe my experience will be helpful.

Springer act like springers...metal spring or gas spring. It's a big chunk of weight (the piston) moving forward and then rebounding back at each shot....could be powered by aardvark farts for all the difference in makes.

Gas rams are a little more of a solid "chunk" feel...but still have the fore and after vibration that eats scopes and makes a uniform hold important.

Gas springs have little/no "buzz" vibration (even though the vibration is after-the-fact vibration (the shot is already on it's way). A well tuned metal-spring springer has that same "tunk", but gas rams give that feeling without the tuning (which kind of makes you feel better,even if they don't shoot any better).

Lot easier/cheaper to replace a spring and piston seal than replace a gas ram...although either can last years.

LIke I said at first...tried two...there won't likely b a 3rd.


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classicalgas
(@classicalgas)
Joined: 2 years ago
Posts: 70
2019-08-03 13:07:27  

Gas springs are probably harder on scopes than steel springs (in otherwise the same gun)
That's became, since a gas spring is less efficient than a steel spring in returning cocking energy, pressures (and thus piston acceleration) are a bit higher in a gas spring gun yielding the same pellet energy. That "snappy" feel of a gas spring is related to them  being harder on scopes than a slightly slower shot cycle from a steel spring.

 

On the other hand, a really "buzzy" steel spring might shorten scope life, just through vibration.


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xposo
(@xposo)
Joined: 2 years ago
Posts: 5
2019-08-04 01:39:17  
Posted by: @eddieirvine

Question for my friends here, i bought a gamo swarm to have in my shop for ground squirrels, i have a couple of  pcp short guns i fill with high pressure air and like them very much, just thought i would use this and keep it in my shop for cheap shooting. the scope that came with it the cross hairs turned inside the scope and i knew it was a cheap scope, just thought i would try it out. so my question is with this nitro piston instead of a spring, do i need to buy a springer rated scope? Let me know if you get an extra minute and thanks

Yes you do need to get one. I have two rams, a HW80, and a Webley Stingray,(Birmingham) both installed by David Slade, years ago. When I sent each rifle to David, it gave me time to check out scopes that could handle ram recoil. I went with Hawke. Good price, excellent customer service, holds zero, and tough. Great scopes. I’ve put on their top line scopes to the affordable ones, all held zero. To this day, the model, Sport HD non AO, their cheapest scope at the time is still sitting on the HW80. The Stingray, to this day has a 1st Generation Airmax on it. Both guns have if I have to guess, have well over 5,000 shots on those scopes. 


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eddieirvine
(@eddieirvine)
Joined: 11 months ago
Posts: 21
2019-08-04 05:14:00  

@xposo

Thanks sounds like what i need, appreciate you taking the time to post for me, Thanks very much


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eddieirvine
(@eddieirvine)
Joined: 11 months ago
Posts: 21
2019-08-04 05:17:24  

Thanks for the post this helped me know what i thought i knew about the gas piston recoil, now need to shop for a scope, I wondwer what is in the future for these air guns, some magic propeller ?? no recoil


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jkorny
(@jkorny)
Joined: 8 months ago
Posts: 7
2019-08-04 13:18:11  

Fwiw crossbow scopes are designed to handle the dual recoil, bought a few centerpoints on the cheap from Crosman but have yet to put them to the test. 


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dcw
 dcw
(@dcw)
Joined: 2 years ago
Posts: 61
2019-08-10 16:52:15  

I have RX series Beeman and HW 90 series rifles.

both are very hard recoiling. 

I'm in the process of testing the ZR scope mount. I made a mod to it recommended on another forum. so far, it seems to be holding up ok but for the long haul...yet to be seen.


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Griff1950
(@griff1950)
Joined: 2 years ago
Posts: 3
2019-08-14 17:31:47  

Counterpoint scopes have done very well for me, even on magnum springers.Heavy, though. 😛 


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