most powerful 25cal air rifles+ bull pup length

The Wildcat MK3 is a bad motha shut yo mouth! and can be tuned and modified to some serious FT/LBS. Extremally accurate too. (compact version) I own the longer MK3 sniper and added the extended plenum and dual port barrel transfer port. I'm getting 1009fps with the 25gr JSB kings and 900+ fps with the 34gr heavys and still have more power if needed as the amp reg is set around 135bar. I was able to do all this thanks to the guidance from JoeKool here on this site.

Thanks again to JoeKool

Rti prophet. I have the 25 cal performance edition and easily adjusted from more or less power. Will say you need a moderator as you up the power.

I have a NovaStar/Neutron Star. Done a lot of work to it but it is very accurate. It is one of those guns I would not buy again. It has design problems and is very unreliable. If I was you I would not consider the Neutron Star.

Butch

I'm getting a full 10 shot magazine at over 80fpe from the Kral Puncher Breaker in 25cal. Just over 7lbs and short. Barrel is threaded for a suppressor already so easy to keep quiet. 

A really fun gun.

SouthernGunner has the hatsans you mentioned and has reviewed and shot them on his YouTube channel - check it out. His Hercules Bully shoots very well

Also look at the Hatsan Carnovore .30 side lever. Only $500 and puts out a sh^ton of power. You can also try .30 polymags- total destruction 

The Kral Puncher Breaker posted by @thammer is awesome at the power level and price but will require modifications to be done. Although they may seem like low cost mods the real cost is the labor to do the mods properly and not hack the gun. If you are confident in your mechanical skills I say go with the puncher breaker.

The .30 Hatsan carnivore will definitely give you over 90 fpe but is no where near bullpup length. Unless you can find a used one for $300-$400 and buy a bullpup stock for $220 (https://bull-pup.com/komplekt-bullpap-dlya-hatsan-bt-65-new-vlagostoykaya-fanera-palisandr-kbn65-2fp.html)

If budget is not an issue: I highly recommend either a huben or lcs sk19 in .25

They can both easily be tuned to 100 fpe or detuned to 12 fpe. This tuning can be done on the fly in under 30 seconds. Externally adjustable regulator, power wheel, semi auto and full auto(sk19), compact, lightweight, great ergonomics, and THE most fun guns to shoot hands down(especially the sk19 with full auto)

Hi 

Take a look at the Sumatra in 25 cal either the rifle or carbine, an ldc will quite it down 

Lots of power, not pellet picky and you can adjust power on the fly 

Not sure who still has them 

Hope this helps

Dave 

Shot placement is King I have seen coyote taken with a springer, 177 cal to the brain at closer range, coyote so focused on the chickens in the pen he didnt notice the man 20 yards away waiting on him.

+ 1 on the Sumatra.I have the carbine version .25 I’ve only tried the 49 gr hunter supply slugs in it at around 750 fps they were not that great.It shoots really good with JSB 34 gr though and 25.39,haven’t tried much else in it.

.. but i am wondering if a step up in power to 25 cal would be a good idea for hunting coyotes. i should be able to get off 50 yard shots or even closer based on my experience seeing them on a regular basis...

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50 yards and under, .25 cal compact hunter, nothing can touch a Airforce TalonP. Out of the box 50fpe, very easy to make more, and is the easiest gun I have ever worked on.

DonnyFL adapter + Emperor and silently terminate any coyote you see.

Power tuned Cricket from Georgia airguns, talk to Charlie. Can't beat it. 

Or a .22 Huben shooting 25gr pellet up to 950fps. 

Get the new condor ss in 25 cal...its does 90 ftlb with it's new valve 

For a light wgt thumper look at the Condor ss .25. Will push a hunters supply 48 gr hp @ 880 for 82 fpe. Nice budget hunter and accurate also.

My 30 cal Hatsan Hercules Bully came out of the box at 1075 using the 44.75 grain lead pellets. The 3 mags it comes with will easily hold 10 shots of the predator polymags. I tuned mine down to 889 FPS for 24 shots. The design of the mag will never allow a double feed, it’s a side cocker with an adjustable cheek rest. I get 5/8” to 3/4” groups with mine at 55 yards. I’m going to fix that shortly by modifying it to use the FX STX system.

Best of all, its in your price range. Unfortunately you’ll have to buy it new, as I never ever see 25 or 30 cals being sold in any classifieds sections.

Negatives- before you even mount a scope on it, order the scope rail from hatsan parts dept off of a hatsan Bullmaster($29), and replace that factory rail with that one. True bolt on. That factory rail is a hollow channel that is attached to the bottle cover, and the rail flexes which transfers to your scope. Believe me, you will go crazy trying to shoot decent groups with the factory rail. 

Second, it is so very loud. Pick your moderator wisely. The Shogun barely helped it. I had to re wrap the innards of the Shogun with neoprene wrap to muffle the sound. If you live in the suburbs and want to plink with this gun, your neighbors will get upset for sure. 

But, back to the power, it is a beast of a gun. Good luck in your search.

I have an Akela and my friends have a Marauder and A Condor. We don't have a chrono yet but, That Condor just flat smacks way harder then ours. Mine is by far the quietest the Condor sounds like a 410 being shot. Now he has parts coming from Talon to quiet it down. I'll let you know how that works out. He just ordered some slugs for the Condor from Nielsen and we should have a chrony by this weekend. If that happens I'll let you know

i second the airforce condor. 110 fpe. give or take depending on ammo. definitely will need a suppressor as it sounds like a canon otherwise. i made a custom unit for mine and its crazy quiet. currently tuned at 50 fpe with 29.2 grain noe hunter pellets. 

Just took a gray squirrel at 25-30 yards. right in the eyeball. drt. if you get the tophat kit for the new spinlock tank as i did you can pretty much tune the gun for whatever you want it to be. i ended up using the .145" cap and get around 30 shots on a fill from 2400 psi to 2000 psi.