For myself have no need for one. Here are some reasons.
I am a firm believer when hunting any animal, 1 shot 1 kill, make that 1st one count.

1. Air Efficiency & Shot Count​

Semi-autos often use more air per shot than bolt-action or single-shot PCPs. That means fewer shots per fill and more frequent trips to the tank or compressor.

2. Complex Cycling Mechanisms​

The semi-auto action relies on precise timing and pressure to cycle reliably. If the regulator isn’t tuned just right or the hammer spring is off, you can get:

• Double feeds
• Failure to cycle
• Inconsistent velocity

3. Pellet/Slug Sensitivity​

They can be picky eaters. Some semi-autos jam or misfeed with certain slug shapes or skirt designs—especially if the magazine tolerances are tight or the feed ramp isn’t polished.

4. Increased Wear and Tear​

More moving parts = more maintenance. The cycling mechanism, especially in blowback-style designs, can wear faster than simpler bolt-action setups. O-rings, springs, and seals take a beating.

5. Trigger Feel​

Some semi-autos sacrifice trigger crispness for mechanical simplicity. You might notice a longer or mushier pull compared to a finely tuned single-shot.

6. Regulator Stress​

Rapid fire can cause pressure fluctuations if the reg can’t keep up. That leads to velocity swings and inconsistent point of impact—especially noticeable in long-range shooting.

7. Noise​

They tend to be louder, both mechanically and in muzzle report. That’s not ideal for stealthy hunting setups unless you’ve got a solid moderator and internal baffling.

Vetmx said:

How does yours shoot? I picked up a used shorty .22 and I’m not impressed. While cleaning it I noticed no choke and thought this might not be good. It’s even a scatter gun with every slug I tried. Mine does best with an 18gr pellet. But at 50 yards it’s horrible. I’m worn out from messing with it but might reduce my 18.1 speed down from 915 to maybe 880fps.

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At 20-25 y it’s spot on with JSBs 18.13s. ( I did have to dail speed down to right @900 )

I’m sorry you’re having difficulties

How’s your crown?
I believe the creator was having a lathe issue at the time of these.

I know the JSb 18.13 has a head size of 5.52 and that might make the difference.
I believe HN may make a 5.53 head pellet.

I'm new to the air gun world. But I have a fair bit of experience in the firearms world, and I would imagine the differences between bolt-action (or single shot) and semi-auto are the same, since Physics is Physics.

Semi-auto requires that some of the energy (from the air pressure or explosion of powder, as the case may be) is used to cycle the action. That reduces the amount of energy being used to expel the projectile. So projectile velocities are a bit lower with semi-auto.... if that matters.

In the precision (firearm) shooting world, bolt-actions are preferred. Fewer moving parts. Tighter lock-up and chambering.

Semi-autos are more prone to malfunctions / misfeeds than bolt-action.

That's all I've got for now!

personally i think semi auto makes for a lazy shooter , just blast away . If hunting too many wounded shots, yes a kill 2 or 3 shots = suffering on the targets part .

I have a Red Wolf standard that shoots 10.3 pellets at about 885 fps on high power. I added the 700cc bottle to it and get at least 260 shots on high power. I usually fill it once I'm about 150 bar and don't usually run it down to the low pressure (130 bar??). Low power setting gets me about 12 fpe.

dan_house said:

"Posting ranges skunks those who want the additional traditional challenge."

Just put the ranges on the score card for that class, and have those folks all shoot together.....

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We have had a match director do that twice. He put the ranges on the back of the scorecards at a club match as an experiment. Didn't cause any change in anyones scores from their average.

ReneR said:

For my Impact M4 .30cal 800mm Superior Heavy STX im am looking for on over the barrel mod. The Fox 600 does not fit, Huma-Air has nothing to offer. I've seen a Hein Fromann Reflex Silencer. Is this available somewhere? Any other ideas? I love it silent and short... I know 800mm is the opposite ;-)

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Good luck. They're known as reflex supressors and I couldn't find one (Hein fromman) for my 700mm tensioned barrel, so I made one and it worked but not well enough for me. The donny fly yokozuna with quick disconnect was the best option.

Silence is more important than shortness to me, but not at the expense of balance. I was running the carbon harmonic shroud modded to fit over a tensioner with a ronin. The yokozuna is lighter, shorter and better. Highly recommend those new design mods.

I ordered a .25 Slash Tactical compact instead of a .22 mostly because ... I hesitate to be honest here but I can't be the only one to think this way ...
because I have so many tins of unused .25 cal pellets left over from an L2 and a Huben K1 I used to have.

Plus the few .30s I've had in the past were overly powerful and much to loud for my local conditions.
That caliber would be a better option for some types of hunting but unnecessary overkill for the shorter range paper target shooters.

And there's already a .22 GK1 around here somewhere to use up any spare .22 pellets, or else a .22 would have been my 1st choice in a Slash because of the wider variety of pellets in .22 cal. On the other hand, when spending this kind of money for an airgun where any caliber of the gun costs the same as another caliber, it is also quite satisfying on some manly emotional level to get the modestly higher shot power offered by the .25 cal over the .22..

Since these airguns have adjustable regulators and power controls. I expect that many people would tune their power down from top maximum anyway when they are tracking down the most accurate velocity ranges for specific pellets. Just because an airgun can be opened up to 100fpe doesn't mean that it can't or shouldn't be powered down to 20fpe for practice. In my mind the biggest advancement of modern airguns, other than the move to PCP air, are the adjustable power options. I don't want an airgun that is stuck at ~100fpe, I want one that can be easily dialed between 10fpe and 100fpe.

The direct technical comparisons I'm looking for would be between a Slash, a Huben K1 and possibly a Leshiy 2.

Those are 3 of the big competitors in that size and power range of semi-auto airguns and many people on the forum have already had the opportunity to compare an L2 and a K1 for themselves. A person might be able to pick up a couple of used K1s in the classifieds for the price of a new Slash with a couple of spare slug magazines.

Will the Slash really be that much better than a K1? Will the L2 have a market battle in that price range?

The Slash probably won't be twice as good as a K1. And the folding modular design of the Leshiy 2 makes it very easy to work on and upgrade and more compact for transport compared to the Slash. But the main thing for me is that the Slash will be different than the K1 and the L2. That's what makes a new model release like this so inherently interesting from a technical perspective. And it's coming from an established company with a good reputation for quality. So I'm not as concerned about 1st release problems as I might be with some other manufacturers.

Of course it will also be nice to have a few removable Slash magazines in hand compared to manually loading a K1 when pellets run out.
The Leshiy 2s also have removable magazines. But it was easier for me to just leave the same magazine in the gun and to use a speed loader to refill it with a single twist of the loader.

JP

Hobbyman2007 said:

I already have an HW100 in this cal that I’ve got tuned to shoot at 16 FPE and it’s perfect for that application. What I’m thinking of is a low powered , 8 fpe ( 8.4 grain at 650fps) with a monster shot count. I’m not an airgun snob , but I refuse to buy a rifle from China and would prefer not to buy from Turkey either. Yes I know that’s going to limit what I can get my hands on.

Here’s the criteria and remember I’m up in Canukistan so I’m already pretty limited.
Bottle fed ,maybe 700cc if the bottle fits
Short-under 36”
Regulated
Under 7 lbs
Multi shot
Wood stock preferably

Here a couple rifles I have in mind.
HW100 with a dr.BOBs bottle adapter
RAW HM1000
FX boss /crown

What other rifles should I consider?

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I can speak to 2 more fx guns the impact and dreamline. The impact I could probably tune to the best efficiency, but the dreamline wouldn't be far behind it.

I've been wanting a 177 dreamline compact tactical and cannot justify the price so I got. An old benjamin discovery, converted to 177 and trust thing let's me shoot for hours on what I consider " very little air"

I got tired of the shift in POI as pressure dropped so I regulate my AirForce rifles and use plenums. Either a Huben Power MAX-ATH (50cc plenum) or my home built plenum.

Right top to bottom
Top hat
M18 extension (tube diameter issue)
20 CM Shan Bao 3000 psi tube (M28 to M18 adapter included with tube)
Huben Power regulator lower 1/2 (just unscrews to M28 that screws into tube)
Huben Power U adapter
Trajectron angled adapter.
Bottle up to 1.6L (fat). 1.1L shown.

The 20cm tube and the rest after the regulator is a 150cc plenum. I can run my .25 condor at 1800psi and get almost 900fps. And shoot several hundred rounds at that pressure with a 1.1L.

.177 you only need a very small plenum. Huben Power Dream or MAX-ATH are plenty (25cc and 50cc plenum) but they add a bit more LOP than the U adapter setup depending on bottle used.

MrP said:

I'm glad you had good luck. But they followed up one mistake with another, and then stopped responding when I told them and sent photos that the replacement pellets were shipped the same way and came damaged. This told me all I needed to know about this company.

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I hear ya. I won't be ordering pellets from them in the future.... I'd rather not depend on luck when it comes to pellet shipping. Other than that... I've spent thousands and thousands of dollars with Midway for firearms items for many many years. I've never had a problem... ever. Fast shipping. No games with things being listed as "in stock" and not actually being in stock (like some merchants).

In the firearms world, Midway has an excellent reputation. A friend on the gun building forum I own just bought a new Marauder for a smokin' deal from Midway USA. It was a blemish model.... got it for under $500! Here's the blemish: A ding on the receiver in the port.



I paid $760 for my Marauder at Pyramyd (and no complaints). But he got his for a tick under $500!

Check out this tread. Send a PM to K&L on here. It is what it took to get my part.

Man I would look at a red wolf standard. I had one in a PRS chassis for field target open class and it got a ton of shots at 20 pounds. No I don't know enough about the Redwolf and programming it to tell you how many that would be and it might be closer to 12 foot pounds. But I would think you would get to 200 shots or more easily.

But it don't meet your weight and length restriction

Racer88 said:

I've ordered a TON of firearms stuff from Midway over the years. They are a good and trustworthy company. I've never had a problem and always very good service. They ship within 24 hours of any order I've made.

But I guess they are simply not well-versed in the world of air rifle stuff.

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I'm glad you had good luck. But they followed up one mistake with another, and then stopped responding when I told them and sent photos that the replacement pellets were shipped the same way and came damaged. This told me all I needed to know about this company.

I usually just sit it on my shooting bench, behind the muzzle a few inches and facing down range. Placement is not critical for me.

drumie said:

They made good with my order after saying something here. I just placed a order with them now. Hopefully all is well with them now. I will report back when I get my order.

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gfl

kwaping said:

Semi-auto seems fun and practical. Why would someone not want one?

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A LOT of people on AGN think ALL semiauti suck. I disagree, I own 4 and other than me breaking one they have worked just fine. The AEA .30 Terminator is a beast and I've never had even one issue. Only problem is there are no .30 magazines available. My Hatsan Barrage and Bullmaster worked most of the time. I took time and a lot of experiments to get the balance of moderator, return spring and hammer spring just right and now they just plain work and very rarely have indexing issues. My hatsan Invader I went a little too far in my experiments, it is now a bolt action. I may go back and see if i can make it work but the Bullmaster and it are .25 so not much incentive there.

But to be honest, I don't shoot my semiauto much anymore. More a novelty that have run their course with me. Not much need for one pest wise. Terminator was awesome for Raccoons but have not seen one in over a year. Squirrels are one and done so my more accurate side levers work better.

I don't have as much experience as most of the posters here, but I do read a lot. I have been lurking this site for years. I seldom see anyone post about problems they are having with their Brocock. They just work. Good luck!

Oh, look at that gorgeous black walnut stock!

Well, I dont have that caliber in a Bullpup

Hmm, semiauto, I'll try that.

There are 3 in that series of rifles, I already have 1.