Diana 350 magnum  

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Foxx
 Foxx
(@foxx)
Joined: 2 weeks ago
Posts: 1
2019-07-08 01:54:45  

Anyone else having problems trying to keep a scope on this gun?


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ekmeister
(@ekmeister)
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Joined: 1 year ago
Posts: 408
2019-07-08 13:23:06  
Posted by: Foxx

Anyone else having problems trying to keep a scope on this gun?

Your question is a most-fitting one, no pun intended.  I'd go as far as saying that everyone and anyone has had problems keeping a scope on the gun unless they used an extremely-sturdy scope and extremely-sturdy mounts or rings.  All springers can be difficult in that regard because of 2-way recoil, but that particular ultra-magnum spring rifle is even more of a hammer.

That said, all of that has been successfully-done numerous times with hardware that's been available for years.  I've set up several of them myself for tuning customers.  Others have done it for their own rifles.

Let me step-back a minute and say that while the above has been done with the 350 starting back years ago,  a more-recent innovation in scope mounts has (supposedly) made the job easier, and possibly less-expensive as to total cost.  That innovation is the zero-recoil ZR mount that absorbs the recoil normally-transmitted to the scope with a spring-loaded sliding mechanism, almost identical to the way the RWS 54 provides anti-recoil operation. 

The design theory is sound, my only concern is that the tolerances need to be good so accuracy doesn't suffer.  I haven't used one to know, but those who have used it say it works just fine in that regard.  Someone here on the forum took the out-of-the-box version and made the tolerances even tighter, by adding a few synthetic bushings in the base.  But, even those who have tried it in its stock version say accuracy is still good IIRC (that sounds very-possible, since the RWS 54 produces excellent accuracy using an almost-identical sliding system).

The ZR mount works like this (the video is less than 2 minutes long):

It also has some barrel droop compensation built in, and your particular 350 will probably have some droop, so that's a plus.  Sometimes they're hard to find in-stock, but it looks like they're on the shelf today, here, to name one place:

https://www.pyramydair.com/s/a/Bullseye_ZR_1_Pc_Mount_Fits_1_and_30mm_tubes_11mm_Dovetail_0_04_Droop_Compensation_Recoil_Compensation/5495

One added benefit of the mount is that it will fit scopes with either a 1" or 30 MM tube.  If it works as well as they say it does, you can actually go with a scope that doesn't cost as much, because it doesn't have to absorb as much recoil as it would otherwise.

Anyway, others will probably comment about any and all of this.  I think this will get you started.

HTH.

 

Safe and Happy Shooting!

Ed, the Airgun TuneMeister

https://www.airguntunemeister.com/


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marflow
(@marflow)
Joined: 1 year ago
Posts: 587
2019-07-08 14:36:02  

Foxx tell us what you have tried

I think just using dovetail ring would never work, maybe using 4 and a stop

you really need a mount with enough droop as stated all ready

and I have never seen a question like this on the 350

some reading

https://www.pyramydair.com/blog/2008/06/leapers-base-for-rws-diana-rifles-part-1how-we-began/

Mike


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Hector J Medina G
(@hector-j-medina-g)
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Mike Ellingsworth
(@4888blues)
Joined: 1 year ago
Posts: 151
2019-07-14 14:26:37  

@hector-j-medina-g

Taming the harmonics in a springer has my attention, I am liking that sliding scope mount also.

Anything to improve a springer turns me  on . "Thanks  for  taking the time and sharing your info

 I have stumbled  onto  your website by accident , and will try  to catch up .

theirs simply not enough time  to do   all the things one would want to get into , 

Mike E

My Youtube Channel


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Hector J Medina G
(@hector-j-medina-g)
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Posts: 243
2019-07-14 15:18:13  
Posted by: @4888blues

theirs simply not enough time  to do   all the things one would want to get into , 

Mike E

So, VERY true!

As for springers, the latest prototype of the Harmonics reducer is working real well in the higher powered DIANA's. We'll see if DIANA  decides to implement it, either as an accessory in some guns, or as an aftermarket item.

I must say I admire your work in the small pump-ups.

Pursuing a most interesting avenue there.

Thanks for your kind words.

 

 

HM


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Mike Ellingsworth
(@4888blues)
Joined: 1 year ago
Posts: 151
2019-07-14 15:37:06  
Posted by: @hector-j-medina-g
Posted by: @4888blues

theirs simply not enough time  to do   all the things one would want to get into , 

Mike E

I must say I admire your work in the small pump-ups.

Pursuing a most interesting avenue there.

Thanks for your kind words.

 

 

HM

Your welcome.

I do you tube  videos  on springer's  Ive purchased  and been sharing info  on the hatsan guns and  other finer rifles, I'll be able  to do more  when I  retire

I think  you have me mixed up with some one else  I have not done anything with pump up guns , just springer's

I was looking  into something like this for the harmonic  dampener ,  was on my to do list

https://www.amazon.com/MATHEWS-Genuine-Nano-Damper-2pk/dp/B07CHV6Y8F/ref=pd_cp_200_3?pd_rd_w=adlQ3&pf_rd_p=ef4dc990-a9ca-4945-ae0

they are used with bows, the Ideal was to how to make  something for the barrel

https://www.mathewsinc.com/product/enhanced-harmonic-stabilizer-2/

 

My Youtube Channel


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Hector J Medina G
(@hector-j-medina-g)
Member of Trade
Joined: 1 year ago
Posts: 243
2019-07-15 15:46:26  

My Apologies, Mike!

Yes it seems I am mistaken in the person I was thinking about. Sorry.

We've looked into different mechanisms for airguns, from the existing devices for RF's and CF's to devices for Xbows; but we have settled on one that ends up looking like this for fixed barrels:

For breakbarrels, we need a slightly larger diameter device, which in itself is not a bad thing because it aids in cocking powerful springers.
We think it is a clean and good-looking enough muzzle piece. And it doesn't add a single mm of barrel length.

Of course the important "thingy" is what is inside, I cannot show you that, but results so far are very promising; with the old 56 style MW (Glued in place), the gun shot like this:

After tuning it came to this:

As you can see, the gun did shoot well ONE type/weight of pellet (different for each tune), but after the installation of the Harmonics Reducer (HR) device, it now shoots like this:

"CB" stands for Cold Bore.  "T" stands for transition shot. All tests performed at 35 yards from the sitting FT position.

So . . . now all three weights of pellet produce reasonable accuracy/precision. 

Sure there is always one that bests the others, but the relative stability of such different weights tell me we do have a winning design here.

We'll be looking at integrating this device with an LDC. Not that it is awfully needed in a well tuned springer, but it is an interesting technical challenge and something that is in high demand.

Keep well and shoot straight!

 

 

 

 

 

HM


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josh3rd
(@josh3rd)
Joined: 1 year ago
Posts: 87
2019-07-15 20:57:00  

That's pretty awesome brother


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Mike Ellingsworth
(@4888blues)
Joined: 1 year ago
Posts: 151
2019-07-15 21:19:06  

@hector-j-medina-g

That looks very nice  and inexpressive results ,  was  That your Ideal , I am out of the loop if you spoke with them  about the design , It takes a special person for something good to come along 

God forbid if the air gun manufactures  would think about it on their own.

  Ive entertained  jell filled  inner chamber Ideals on a barrel shroud to UHMW rod etc , just never got around to trying things out, and like wise  to help off set recoil

 

My Youtube Channel


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Mike Ellingsworth
(@4888blues)
Joined: 1 year ago
Posts: 151
2019-07-15 22:10:32  
Posted by: @foxx

Anyone else having problems trying to keep a scope on this gun?

Good  ways back I did mine with a soft tune spring  and I can not  remember who sold that,  had to be one of the two vendors

I would think  it would of  been James Maccari the rifle was  all around a lot  nicer. probably  could just detune it to help and get a custom spring guide made  for it, 

My Youtube Channel


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ekmeister
(@ekmeister)
Member of Trade
Joined: 1 year ago
Posts: 408
2019-07-15 22:57:20  
Posted by: @4888blues
Posted by: @foxx

Anyone else having problems trying to keep a scope on this gun?

Good  ways back I did mine with a soft tune spring  and I can not  remember who sold that,  had to be one of the two vendors

I would think  it would of  been James Maccari the rifle was  all around a lot  nicer. probably  could just detune it to help and get a custom spring guide made  for it, 

The factory spring has a pretty good amount of coils and pre-load.  You could cut-off a few coils and close the spring with heat if you know the right way to do it--it would be dependable if correctly done.  That could be the way to get the soft tune you mention.  I've cut and closed springs for several guns--for other springers I mean.  No one I ever tuned a 350 for has wanted less power.  They always seem to buy the gun because of what it will do at full power.

JM used to sell his own 350 spring, and of course I prefer to use one of those over the factory version.  He was closing them out and he no longer sells them.  So, I bought 5 or 6 of those spring for future use, and still have most of them in stock.  I'm saving them for tuning projects, not for separate parts sales.   It's why I bought them.

They work in other rifles, too.  I mean, when cut and closed as I mentioned.  You can duplicate the original design of the JM ARH spring, which gives the most SMOOTH power/velocity I've ever been able to get.  They're also a pretty-good fit on a factory guide for still getting basically no twang, so no custom guides let's you get a nice tune on a budget.   But, again, you have to use proper technique and exercise caution when you shorten one, so it doesn't break.

Safe and Happy Shooting!

Ed, the Airgun TuneMeister

https://www.airguntunemeister.com/


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Mike Ellingsworth
(@4888blues)
Joined: 1 year ago
Posts: 151
2019-07-15 23:09:25  

@ekmeister

I thought it was J M , Yes  one has to be careful not to heat the spring to far  no red glowing coils  LOL  one could practice  on a junk  spring until they get the results with out over doing  it.

I had a bunch  of factory rws  350 springs  when some one cleaned shop I asked for them , 

good info as always . I ve always liked  the 350  has that rifle look I  really like.

My Youtube Channel


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