Taipan "BlingVet" .22cal Project

Edit: final configuration..

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Preface - I'm not a bling guy, but I started putting together this rifle with a lot of shiny silver parts and decided to call it the BlingVet.

Custom ingredients for this build:

  • Taipan Veteran (Long)
  • High-power valve system (classified)
  • Heavier factory-style hammer (A2 tool steel + PEEK)
  • Hand-made hammer spring (Stainless spring steel)
  • Larger hammer spring tension knob (7075 AL)
  • Biathlon-style low-profile lever system (6061 & 7075 AL)
  • Kelby canted Picatinny rail (7075 AL)
  • Bushings for the stock screws (7075 AL)
  • 535mm Polygonal LW .22cal barrel (custom spec for JSB Monster Redesigned & JSB Beasts)
  • Complete stainless steel screw overhaul
  • Plug insert for the muzzle end of the moderator, greatly reduces shot report (Delrin 150)
  • Huma regulator
  • Single plenum chamber extension
  • New trigger system (6061 AL)

Powerplant - I got this rifle new a while back and the first thing that I did with it was make a new higher performance valve system. The second modification was installing Huma regulator. There's nothing wrong with the factory regs, but they're not setup for as wide of a range of adjustment and I just prefer them in all of my non-FX rifles.

Hammer system - I made a factory-like hammer from A2 tool steel with a PEEK insert at the striker. Running the on the right (in the first photo):

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I make my own hammer springs for better control over specifications (it got tiring never having the right compression springs!). No photos making this particular spring, but the process looks like this (this was my first test / mandrel, but I've got the process down much better now lol)..

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Moderator insert - I machined this insert to be just a hair over the maximum projectile diameter that I plan to ever shoot from these rifles in .22cal. I do a couple of other things to the baffle system, but this mod alone reduces the shot report signature significantly!!! Being in full control over the concentricity from the breech to the end of the moderator, I can get away with making this opening as small as possible..

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(That's lubrication around the edges in the last photo btw)

Biathlon-style, low-profile "no snag" cocking mechanism- the goal here was simple - I wanted a biathlon lever as close to the action as possible. There's nothing more frustrating to me with the Veterans / Crickets than to have that charging lever get snagged on something and it cycles the mag!

This design here definitely mitigates that very well, and it's not SO close that I can't open it. I also machined / polished the big internal linkage piece a fraction larger than the factory component, which keeps it more rigidly in place..

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Here is an alternative mechanism that extends the lever out a little more (still much closer than how the factory lever protrudes)..

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Hammer spring adjuster with "speed dialer" - I whipped that one up in a hurry to test something, but the velocity / "speed" tape works very, very well! (I posted this mod some time ago with my Mutant). 

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Trigger system with "Space Invader" trigger blade - this was my first attempt at making a trigger. I milled this entire thing by hand, but as I worked through this I realized that I wanted some heavy texturing to the trigger blade, which I milled out to be a precise fit for my trigger finger. It looks sharp, but it's COMFORTABLE!!!! Totally changes the dynamics of the trigger pull!!! There's more leverage with this thing, but I'm much more in tune with each stage now..

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Barrel - this is a .22cal choked LW polygonal barrel with a special twist rate for the MRDs and Beasts. Not ready to discuss the details just yet, but I chambered the blank perfect for the Taipans and threaded it for the block.

Bipod rail & stock screw bushings - For the rail, I milled down a 20MOA dovetail to Picatinny rail in raw 7075 that I already had. I wanted to keep some of that angle in there so that I could have better resistance on a bench with my bipod legs extended straight down at 90 degrees (thus titling them back a little). This rail system was pre-threaded with 1/4-28 set screws, and that gave me the idea to bypass the need for T-nuts (I usually countersink stocks with T-nuts).

I drilled and threaded the laminate stock to 1/4-28, and cut down some flanged stainless hex bolts with some big flat washers underneath. This threads into the rail and PULLS it snug to the stock. No need for Loctite.. Pretty awesome!!! 


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Probably left some things out, but I'd say that I'm about 85% done with this rifle. I want to make a glossy twill carbon fiber moderator for it with stainless endcaps. The HST dialer and trigger are just a prototyping tests, so I'll eventually get around to making final parts.

I have only shot it at 23y so far (hitting the range tomorrow), but it put 5 through a pellet sized hole twice when I zeroed it. Hoping that precision translates over at longer ranges!


 
mtnGhost,

Your thorough understanding of the inner workings of the Taipan is impressive all by itself. To have a mind that can diagnose shortcomings and invent a “fix” takes your talent to the next level. To have the talent and ability to do the work yourself blows my mind. Thanks for taking time to allow this Neanderthal a glimpse into the life of a truly dedicated airgunner. Thought after 25 years of airgunning that I was one but I was wrong! Blessings
 
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Thank you all for the kind words!

A little update, it's looking to be VERY accurate with the JSB MRDs, but not as great with the Beasts. this tuned maxed them out at 905FPS). I only have 8-9 tins of some really, really bad Monsters unfortunately, so I sorted a few mags by weight and spot checked head diameters before I drove out to the range.

There's some tuning sweet spots for sure with MRDs in this barrel. I'll have to review the videos I took to pick out more velocity ranges to test again, but it's looking as if 990-1005, 940-960, and ~870FPS were all grouping the tightest. The Beasts were all over the place, as were the 24gr Varmint Knockers.

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Damn .. at a 100 she's a shooter for sure !!! Very nice.

Yes sir! It's just too bad that 80% of my 8-9 tins of MRDs are total trash! (Defective skirts)

I went to the range this afternoon with several rifles, and figured that it would be worth testing the 18gr JSBs at high velocity. Had a spring and hammer weight that were pretty specific to the MRD/Beast tune, but I was able to shoot with a stable ES down to 1038FPS with (unsorted) 18gr.

Sure enough, the 18gr very VERY stable at 1038 (and up to 1075). I could hear them breaking the sound barrier at 1092, which at no surprise increased the flyers lol. Had a flyer or two here and there in high transonic, but those unsorted pellets were grouping primarily under an inch at 100y and a single hole at 50y.

Overall, I think that using non-defective MRDs with this barrel would put it on a level playing field with the most accurate of .30cal rifles at 100y. The wind holds with 18gr are going to be more drastic at 100y obviously, but I don't think that this thing can miss an X at 50y. 
 
Finished adding the last piece to this project last night:

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Being OCD about durability and modularity, I decided to use threaded brass inserts for the stock.


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The main bolt is a 1/4"-20 and there's two smaller 10-32's below it. I also drilled out a path for the upper M8x1.25 set screw that holds in the upper side of the big stainless sliding rod (that the adjustable buttpad attaches to).

Fabricated a plate from Derin and shaped a custom piece of harder ballistic foam. Took an iron to the edges of the foam to shape the rough cutout spots flush to the edges of the stock.

Took several hours spanning a couple of days to sort this stock out to the way I felt it should be.

Couldn't be happier with end results!!!

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That’s not bad but you really should get in touch with 1shot1kill. He gets single hole groups at 300 yards with a P12 . I’m sure he’d be happy to tell you how to polish your barrel like he does. 



Just kidding of course. That is some fine work on an even finer rifle. Sure wish they would come out with a standard rifle and sell them up here in Canada. I’ve never read a negative post about these little beauties.