So ... HOW MUCH POWER can a TAIPAN MUTANT standard make ?

[Motorhead]

   Not to get lost within previous thread on the Mutant http://www.gatewaytoairguns.org/GTA/index.php?topic=112498.msg1097350#msg1097350 where the last modifications were to simply change out the plenum spacer for one having more volume ( gained by thinner wall and a tad more length )

The volume of regulated air within plenum is the ONLY thing changed here other than hammer spring adjustment to find out what gains were made doing so.  POST #101 within above thread describes the change made.


So ... HOW MUCH POWER did it make available

The rifle in stock form with velocity adjuster flush with receiver had JSB 18.1's doing @ 940 fps for a tad over 35 ft lbs.
Now with the larger plenum at the same setting the 18.1's are doing @ 990 fps for a tad over 39 ft lbs.
For giggles while turned up ran some H&N Barracuda 21.1 grain with them doing 925 fps producing 40 ft lbs !

While rifles an air hog cranked up, this power setting is a full 1 3/4 turns more than I'm running at normally with JSB 15.9's at 900 fps for @ 28.6 ft lbs.

Very flexible power range adjusted with simple hammer spring tension changes 

[anti-squirrel]

Any time an airgun is that tunable with minor changes, it tells me point blank that it is well designed and efficient.  I'd expect it to be a bit of a  pig at higher power levels- what would you consider the Sweet Spot for shot string vs power?  From my uninformed viewpoint, just under 30fpe with the JSB 15s sounds to be nearly perfect for general use.  And we all know how accurate the Mutants are.

[dman1114]

I have done Quite a Bit to Mine... It Has the Older Shorter Barrel   11" vs the now 13" barrel.  I have it shooting 18.1s at 865 fps  with the Reg set at around 138 bar.

When testing some Std size barrels in Her i was able to to see in excess of 1000 fps ....

Ive thought about converting it to .25 then making an airtube extension to expand the regulated chamber   I think this would be a ball of fun in .25

[PelletsForPests]

I read about some problems with the trigger wearing out prematurely. Has that been worked out?

Been doing a bit of research on the Mutant and it definitely seems like one of the best priced, most consistent, powerful lightweight bullpups on the market. The chrony strings people have been posting are incredibly tight!

[TleVta]

For giggles while turned up ran some H&N Barracuda 21.1 grain with them doing 925 fps producing 40 ft lbs !

Yes!

I read about some problems with the trigger wearing out prematurely. Has that been worked out?

Where did you see that?

[PelletsForPests]

Googling Taipan Mutant lead me to Airgun Nation where there's been a lot of criticism. All in all seems like there aren't many dissatisfied actual owners.

[BigTinBoat]

Googling Taipan Mutant lead me to Airgun Nation where there's been a lot of criticism. All in all seems like there aren't many dissatisfied actual owners.

If you research it thoroughly I think you will find most of that "criticism" was started by an air gun dealer in a different country. He sells competing brands.

When I see a guy like Ernest Rowe (who works on most all brands of bullpups) say the things he does about the quality of the Mutant (especially the trigger) I believe him, the other guy not so much.

[moorepower]

How many shots at high power?

[anti-squirrel]

When I see a guy like Ernest Rowe (who works on most all brands of bullpups) say the things he does about the quality of the Mutant (especially the trigger) I believe him, the other guy not so much.

This.

The number of people here on GTA that wax poetic about this 'pup is another consideration.  I also look at it this way: efficiency is always something I look at.  When an air rifle can be dead-nuts accurate in multiple-shooter's hands, sell under the cost of other similar rifles, and get a lot of praise as a hunting machine, not just a paper-puncher, while still yielding this range of power and shot-string, it really drives home that the Taipan Mutant is a seriously versatile airgun.

[wimpanzee]

Googling Taipan Mutant lead me to Airgun Nation where there's been a lot of criticism. All in all seems like there aren't many dissatisfied actual owners.

If you research it thoroughly I think you will find most of that "criticism" was started by an air gun dealer in a different country. He sells competing brands.

When I see a guy like Ernest Rowe (who works on most all brands of bullpups) say the things he does about the quality of the Mutant (especially the trigger) I believe him, the other guy not so much.

Motorhead's review is what pushed me to buying a mutant. I had been flopping between a vulcan and a wildcat. I really really like mine. I've got it tuned down to 29fpe for 48 shots in a 225bar fill. That is ALL DAY in the woods.

[PelletsForPests]

Googling Taipan Mutant lead me to Airgun Nation where there's been a lot of criticism. All in all seems like there aren't many dissatisfied actual owners.

If you research it thoroughly I think you will find most of that "criticism" was started by an air gun dealer in a different country. He sells competing brands.

When I see a guy like Ernest Rowe (who works on most all brands of bullpups) say the things he does about the quality of the Mutant (especially the trigger) I believe him, the other guy not so much.

Motorhead's review is what pushed me to buying a mutant. I had been flopping between a vulcan and a wildcat. I really really like mine. I've got it tuned down to 29fpe for 48 shots in a 225bar fill. That is ALL DAY in the woods.

That's awesome. Haven't seen any in stock anywhere for the past week or so, but it's definitely a desirable gun.

[Motorhead]

An update on efficiency etc ...
was out today taking a hike with my son who has a Cricket .22 pup.
We sat down on this side hill & filled BOTH our guns to 250 bar, loaded up magazines Then proceeded to bang away at some buckeye trees that still had Balls ( Seed Pods ) hanging on the branches.

My standard Mutant at 5 mags ( 60 shots ) still had @ 155 bar so i put threw a 6th mag ( 72 shots ) and then a 7th ( 84 shots ) where the POI at @ 40 yards remained unchanged !!!  ... pressure reading @ 100 bar and from this point the POI did start falling away.  * The first 60 shots had an efficiency of @ 1.42 FPE/cuin per shot

With the work done to valve & plenum the gun remained very stable as it entered self regulation at & below 140 bar with enough juice left to be an able small game hunter plinker for honestly +/- 80 shots with JSB 15.9s at @ 900 fps.

This is just one Bad little Pup .... love this gun 

[anti-squirrel]

7 magazines of usable/non-shifting POI power.  Color me impressed!  You are providing a very convincing experience pushing me towards my "big airgun purchase" next year (this year's is already committed).