Tuning taipan standard .177 10.3's speed

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jdanvers

jdanvers

Member
Jul 7, 2019
951
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South Central Upstate NY, United States
Those of you who own one, or have had one in the past, what speed did you find consistent success at for accuracy with 10.3's - I'm assuming 880's. Faster? Slower? I'm expecting a brand new one to show up at my house tomorrow ( 😁 ) and after initial barrel cleaning I'm going to run it over my chrony and dial it up into that range and then take it out into the back yard to check for accuracy. Understandably there is a break in period and I'm hoping that this one doesn't have the OEM regulator weirdness that some experienced in the last year or two with consistent inconsistencies in speed. ( fast, slow, fast, slow - ie 895, 870, 893, 872, 891, 870 ) Those of you who saw this with yours, my .22 long included - you know what I'm referring to. Ugh.
 
I reconfigured the firing system to get better efficiency and shot count from my standard .177 See: https://www.airgunnation.com/topic/taipan-mutant-veteran-no-more-hammer-ping-some-other-tuning-tricks/page/2/?view=all#post-961106

Initially set for @ 920 with 10.3's, have backed off to 890 and it shoots stellar and a better shot count too.



Scott S



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I installed a huma reg on mine, and lowered the regpressure to 90 bar, shooting around 870-890 fps, with 10 grain. The stock reg seemed to be set to around 120 bar, and the gun was not that accurate as I wanted. It was ok, but got better with lower reg pressure. Guess the gun is setup to cover a wide power range from factory, as I was able to shoot the 10 grain past1000 fps, which was to much for my need.


 
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I installed a huma reg on mine, and lowered the regpressure to 90 bar, shooting around 870-890 fps, with 10 grain. The stock reg seemed to be set to around 120 bar, and the gun was not that accurate as I wanted. It was ok, but got better with lower reg pressure. Guess the gun is setup to cover a wide power range from factory, as I was able to shoot the 10 grain past1000 fps, which was to much for my need.

Click to expand...

This is the problem with some Taipans. The reg is set too high. When the new owner backs the HS down to get to a pellet speed that should be accurate, he is so far below the knee that whackyness occurs. Guys blame the reg and buy a Huma. The Taipan reg is great, don’t be afraid of it just because it doesn’t have idiot proof marks on it. If you are hand pumping, then yes the Huma is the way to go but even then you might have to disassemble the gun a couple times until you find the right reg setting for the pellet you want to shoot. 
 
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There was nothing wrong with the original reg. The gun did shoot with litle speed variation, all the way down 750fps or so. It just was not able to shoot the same small groups as my tuned FX guns. I went for a huma reg, as I have a huma regtester also, which make setting the reg up easier.

Now it shoot as good as my impact on 25m. It did take me some more practice to shoot it consitent on a bench.

The factory setup is probably nice if you want to try every available pellet weight. I did try jsb monsters also but they did shoot worse than the heavy's in my gun. So I decided to tune the gun for jsb heavies only. I am mainly a bench shooter, and plinker, but hunters might prefer the extra available power options the factory setup has.


 
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By the way, before I changed the reg, and lowered the pressure. I think my stock taipan was most accurate in the 800-850 fps area. Can not remember exactly.

So to ansver your original question, and find out what speed your gun shoot the best at, I would start as low as maybe 750 fps, and slowly increase speed with the hammer spring adjuster as you shoot groups. If prefer doing two five shot groups before I increase speed maybe 10-20 fps. If it shoot very badly, I may not bother shoting 2, and just continue increasing speed instead. You then can wright down the speed on you target which groups best, as you continue meassuring upwards. There will probably be 2 particular speeds (or maybe 3?) if you measure every 10-20 fps step grouping all the way from 750 to maybe 950 fps. 

You then can choose one of the speed ranges, and fine adjust in even smaller steps with speed starting a litle under, and crossing over, to see if you can get even smaller groups. Maybe with only 5-10 fps increase. The best groups for your gun can basically be any speed in that range. Some would probably start higher than 750, maybe 800, and start from there. But I like to start low on a new gun, just as a learning experiance. Even you might not plan to shoot under 800fps, the information you gather, can be nice to have later. Also if you start at 800 ,and it doeas shoot good, you will never know if you missed a better grouping at 780, if you did not start lower from the beginning.

If you shoot outdoors it is important is is dead calm, when you are shooting for groups, as othervise your testing will not give much information.
 
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The UPS guy showed up a couple of hours ago after I got home from work. 😁 I got 'er unboxed, barrel cleaned, roughly dialed in for speed. I then mounted and leveled scope and took it outside into the back yard for a quick down and dirty ( and windy ) 25 yard "zero". She's shooting the AA 10.3's between 880 and mid 890's - thats a little looser than I'd like the spread to be but again - everything so far, all two hours of it - has been rough, down and dirty. I'm gonna shoot the heck out of it over the weekend to get it broken in, "lead in" the barrel, hopefully maybe the reg will settle some and the speeds will tighten up . . . we'll see.

Trigger is a little . . . . weird. I've got the one on my .22 dialed - I know the gun from having that .22 apart so many times - not a big deal to go into the trigger assembly / linkage and mess with that.

I'm so used to my .22 Long - with a 700mm barrel no less. This little one is kind of hilariously funny looking . . . !! It's a short little thing!! 😂 ( by comparison )

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Thanks @vetmx.

So - per that link that Scott ( @motorhead ) posted to that other thread - we've 'determined' that in a number of respects some of these Taipans ( at least the .177 and .22's ) are in many ways the same gun - same action, same transfer port, etc . . . . can we assume that the reg's are likely the same too?

. . . I just happen to have the OEM reg from out of my .22 that I'm game to play with. I just looked at this video that Ernest Rowe posted several years ago and honestly - it really doesn't appear to be at all difficult to adjust pulling it apart and spinning the adjuster like he shows. I'm guessing to set the reg lower one would dial that clockwise towards the base - Ernest refers to it as a retainer - in order to lighten the tension on the spring. Yes?
 
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jdanvers,

Between Scott and I we determined that the aluminum 'cones' in the shroud have the exact same size orifice. That's ONE part that is the same between models. I'd love to do a side-by-side comparison of the .177 reg and .25 reg... just curious.

My Taipan VL.25 is set to 100 bar, 10ES over 52 shots and the BRAND NEW Huma reg from TalonTunes sits in the bag as received.
 
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