Hatsan BullBoss .25 Thoughts

Ok, first time user of any mid priced PCP. I have owned a $2,500 Daystate and a FX Wildcat. Each were radically different in design but both very precise in form in their own right. I bought a used BullBoss by Hatsan to try out in .25cal to see what the fuss is about. All I have shot before are .22cals.

If FX is a BMW M3 then this Hastan is a Ford F150 with no A/C or cruise control. It is functional. Is it refined? No, it is not. Does it work...yes, it does. It is heavy, powerful. Power is what I was looking for but so is accuracy. The weather has not been my best friend so I only had a night session at 20 yards. 

I cleaned the barrel, got the auto safety feature disabled and put her on a chrony. The spread for an unregulated rig isn't bad. But a Huma is on the way to really work some magic. 39 to 41 ft/lbs, 30gr ammo is 772fps and 27gr is 811fps. I had a reading twice on the same chrony outdoors showing 877 on JSB 25gr ammo. Not sure why 27gr is so much slower but was using led lighting indoors too if that changes anything.

Honestly I can't comment on accuracy. I am running all my rifles moderated but this massive 13oz Emperor is too much on this barrel. I found this out the hard way through frustrating 20 yard shot results. Moving indoors at less than 10 feet I saw the Emperor was detrimental to accuracy. This is not a fault of the rifle. I hope a lighter Shogun on the way wont affect it so much. It is obnoxiously loud without an L.D.C. The factory QE is a bit of a joke, much like the baffles of first gen FX Wildcats. Just get a moderator of any kind for any PCP, in my opinion.

The top rail is awful. I hate half n' half systems. Either you is or you ain't. I ordered a $9 blank picatinny base rail to replace it. The trigger is okay-ish...I will test it but feels to be 2.5 pounds. My Wildcat and Daystate are 9 oz. It is adjustable but looking at it, I doubt it can be improved much. I will see if changing the set screws surprise me in this regard.

The stock is nothing to write home about, flexes alot. The action is so dang heavy the lightest component being the furniture doesnt lend itself well. I am sure the wood stocks are great.

All said, it is cheap and so far does work, I can't argue that. I hope to get a pellet type that groups well. If it is regulated and with the right ammo it should perform well. I am just not walking the property with it. Thus my Hastan experience. I hope this helps any that are curious of what a $2,000 rifle is vs a $500 Turkish behemoth. Long live Daystate and FX!

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mine with all stock shroud and internals is very very quiet,



action ping is kinda on the loud side,but its really quiet at the muzzle.



i tuned mine to get 18 shots using jsb king heavy mk1 at 785fps





as for accuracy,

after removing the barrel and cleaning it really well,

and tightening the nut that holds the shroud on (mine was loose out of the box)

it shoots 1/2" to 3/4" groups at 50yds.



no problem taking pigeons out past 80
 
UPDATE:

The Emperor is off and the Shogun is on. Just as quiet to the ear. Accuracy has arrived. Numbers off my chrony are impressive for the first magazine.

27gr Benjamin Hunter domed

820, 813, 816, 813, 813, 813, 807, 809

150 bar to something like 110 bar.

18 yards just to start. No wind so everything is on me. No left to right strays, adjusted only for elevation. I will check the nut inside baffle. And I don't know what you cats call quiet. LoL. Good shooting have fun everyone.

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I have a bullboss fitted with a Huma regulator and sporting the Ronin DonnyFL moderator sucker hits like a ton of bricks I had it tuned down to 900 FPS using the JSB 181 gr oh its accurate out to 75 yrs with 1" groups. Now my Wildcat (seems my brothers can't stop finger ****ing it) it's such a tamed sweetheart wearing the Tatsu DonnyFL and purrs nonchalantly as it spits out groups 1 1/2" up to 100yrds. The hatsan is wearing the SWFA fixed 16x42 and the Wildcat is topped with the Hawke Vantage 3x12x50. I'm thinking of getting the Discovery (model undetermined at this time) for it.
 
Been working on this BullBoss. Disliked the trigger, just had no feel and was stiff at over 2.5 pounds. All bullpups have to use some rack/pinion method that I am aware of so this is no exception. Someone here mentioned take out the spring behind the trigger.

I found quickly that spring is an assist to the safety mechanism, pushing the trigger up so the block can slide under it. I disabled my auto-safety anyway but still wanted to use it manually. I ramped and polished the safety block so it is angled, slides under trigger 100% now without said spring. Now the pull is 1.12 pounds with about .005 of play when cocked, lol. My safety catch is shortened too, soft metal so just cut it and sanded.

I have a real picatinny rail on top too just have to get new machine screws. It is lower and actual spec not halfn'half dovetail rubish.

Huma regulator is installed but no idea how it performs.

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Meh, kinda hack'n slash at this point. But thanks. This thing is like some Soviet long gun of the 80's. I think the same people from those wars are residing in Turkey now. Nothing is refined on this rig. But, it works. Or so I hope after all this.

A strange phenomenon is it NEEDS a top rail/scope base for the action to push against during the lever stroke. If you see my blank base is longer...I will drill and tap a 2nd screw into the top to give it more strength.

Have I voided my warranty yet??? LoL. 😂🤣
 
So I installed the Huma, got it to 200 BAR via a hand pump and the speeds where 794ish with 25gr JSB. Regulator is set to 150 BAR, maybe too high but I thought, oh yeah, adjust the hammer spring dummy. I did counter clockwise a few turns and speeds got lower and erratic. I turned more to make it heavy and even crazier wild numbers. I think I need to go the route of cutting a notch in the threads per Huma instructions as I dont think it is breathing correctly. Maybe lower it to about 125 too. I want it at 40fpe but 38 is okay. 34 is too low imo.

Anyway, I wanted to see if gunk or a bad o-ring was blocking transfer port. I know the UK version the port is a tiny hole. Well, it is not small on this model, no way to even enlarge it. I take barrel off and was appalled. Metal shavings INSIDE the SHROUD were EVERYWHERE. This was from the factory too, no other place it could get there. All of the innner workings were filth. The barrel nut was loose even though I had it tight from within the shroud? Odd. A delrin plastic nut anyway. Photos really can't show how bad it was/is. Havent but run a patch through the shroud to get the metal out. Barrel is next.

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I keep working on this thing so more updates. I vented the Huma per their instructions of using a triangle file and slotting the threads. I set it lower to 130 BAR to see the difference. Hammer spring is halfway backed out on tension. Mine is 12 turns all the way in or out. 

So I started all the way in from the lightest and backed it 6 full turns. HUMA at 150 BAR was pushing 25gr JSBs 794 FPS (but not venting properly.) 130BAR is giving 770 avg, SD of 2 ES of 7 with 25gr JSBs. Only a 9 shot string. Right at 33ft lb. I will adjust the hammer but looks like HUMA set to 170 BAR will yield the heavy numbers. Just alot to take it out and readjust.

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