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  #16  
Old 10-26-2006, 07:34 AM
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Fuzzy Limey
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Barrel dampers ..... !



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The Limbsaver device is merely another variation on the vibration damper systems that I described in my articles of several years ago, and now published on my Fuzzy's Projects website:

Fuzzy's Projects . . !

These devices seek to achieve the same results as the fancy adjustable tuners so beloved of the benchrest crowd. The tuner types seek, by means of an adjustable position weight, to force a vibration node point to occur close to the muzzle face of the barrel in the thought that a non-moving, (sic ???), exit point will improve grouping consistency. They can provide extremely good results for a specific set of vibration characteristics ... IE: a specific brand and batch number of ammo .... but must be re-adjusted for optimum results for every different brand and batch number !

The vibration damper types operate on the principle of a shock absorber on the suspension of a moving vehicle ... in other words they damp out, as quickly as possible, all barrel vibrations in the hope that the muzzle is not still flapping around when the bullet leaves the barrel. For most effective usage, the damping medium should react against a solid mass. The military have used these devices for years in large cannon to permit optimum usage of various loads. A similar, yet precise, device for the US Olympic air-rifle team has been in use for many years also. Like the adjustable weight tuners, they can be more precisely tuned if one wishes to spend the time and ammo expenditure required, but their strong point is that they seek to merely minimise the problem in general, (IE: Barrel Vibration !), as opposed to allowing it but controlling it !

Regards,
Bryan - The Fuzzy Limey
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  #17  
Old 10-26-2006, 08:38 AM
Vic-One

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Brian,

I was tuning the trigger of my BB based on instructions in project 10:

Izhmash/Baikal Biathlon Basic Rifle Modifications and Tuning

I have all six trigger parts on my work bench. What do i do now?

Best regards,

Vic-One

Last edited by aom22; 11-13-2008 at 12:02 PM. Reason: Correct Link
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  #18  
Old 10-26-2006, 04:38 PM
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Fuzzy Limey
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Apologies .... !

Hi Vic,

Sorry about that one ... I keep meaning to get back to finish the write-up, and for a hundred reasons keep getting side-tracked - lol ! Too many projects going at once, as always, I suppose !

To be as brief as possible, for this post, basically two things need doing ... slightly trim back and smooth one jagged end of the double-ended hooked spring - (L.H. Bottom in my illustration). This will make it a little easier to slip back into place when re-assembling the trigger unit.

Secondly, the trigger pull weight can be adjusted "up" or "down" by screwing in/out the threaded rod with the transverse hole in one end that fits in the "sear actuator bar", (R.H. Center in my illustration). Final adjustment of creep can be done with the small screw in that same actuator bar .... it's trial and error here. Don't get the threaded rod screwed out too far to reduce spring tension or it'll just flop around. My suggestion if this is not light enough is to hunt up or make a new spring using thinner gauge wire. In my case I needed to heavy up the pull to 3# for CMP competition.

Regards,
Bryan - The Fuzzy Limey

PS: A very small pair of fine needle-nose pliers comes in handy in manipulating the spring hooks into place ... also an assortment of finish nails and fine watchmakers screwdrivers help as "third" - (and "fourth") - hands when re-assembling the complete unit.

PPS: If by any chance you intend to use this BB for CMP shooting, be aware that it is extremely easy to inadvertently touch and move the safety lever back slightly in Rapid Fire antics. I suggest drilling a small in the blade of the lever in front of the trigger guard and inserting a small diameter roll-pin to temporarily disable the safety feature ... this is NOT a recommendation for a permanent installation !!!

Last edited by Fuzzy Limey; 10-26-2006 at 08:37 PM.
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  #19  
Old 10-26-2006, 05:11 PM
Vic-One

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Greatly appreciated.

Vic-One
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