Real world Airgun Reviews – "Facts not Fluff"
Our Preferred Vendors:

Mendoza .22 Break Barrel Rifle with Auto-loading Pellet System and Rear Peep Sight.

When it comes to rifles, it is no secret that I’m a fan of the Mendoza brand. Up until now, I’ve only had experience with their RM200 but now I can add the RM2000 to the list. At first glance the Mendoza RM2000 looks like a bigger version of the RM200 with a few upgrades.

The Mendoza RM2000 has all the standard Mendoza characteristics such as a fiber optic front sight and double trigger system, but Mendoza added a few extras onto the RM2000. For starters, where you would normally have a rear sight, you have an auto-loading pellet magazine designed for their special solid base pellets. What they’ve added for a rear sight is an aperture sight that mounts right on the 11mm scope rail. While it took me a little getting used to, I found this open sight system EXTREMELY accurate.

Hooded Front Fiber Optic Sight

Rear Mounted Aperture, Micro-Click, Adjustable Sight.

Mendoza’s Double Trigger System

With the RM2000 Mendoza promises greater velocity as shown by their inspection tab. My test rifle boasted 924 FPS and an impressive shot group to boot! Wow, 924 FPS in a medium sized break barrel. We’ll see how this all turned out later in the article.

Ok, so let’s look at the whole pellet auto loading magazine contraption. (Although the rifle has an auto-loader, you can still manually use one pellet at a time.) I really like to hunt squirrels and when they get to running through the trees and you want to take another shot, it is a pain to have to take your eyes off the game to load a pellet into the barrel. This mechanism has the potential to eliminate this as a problem, at least for 5 or 6 shots. The system works quite easily as the following photos will show.

Mendoza’s auto-loading pellet system

First of all you pull back the loading pin and rotate the catch into the locked position.

Then you start loading your pellets and this is where things can get REAL interesting. Not just any pellet will work in this system. Since I don’t have any Mendoza .22 solid base pellets, I tried several types to see what was needed to feed and load reliably. I only found one pellet that worked 99% of the time. Fortunately for us it was the RWS Superdome, which also happened to be the most accurate pellet! I figured the RWS Superdome would be a good choice from my time spent with the RM200 and I was right. There are 2 things that make this pellet the right choice for the auto-loading magazine, first is the dome shape. It lends itself well to smoothly entering the pellet catch. The second aspect is its heavy skirt. Other pellets, like the Crosman Premiers, with a thin skirt will easily deform in the magazine and you’ll find yourself with a nasty jam and potentially a damaged rifle. The RWS Superdome seemed to have the right combination for this rifle.

The skirt of an RWS Superdome Pellet. Notice how thick the walls are.

RWS Superdome getting loaded into the magazine.

The pellets load easily into the top of the magazine. While you can load up to 6 or 7 pellets into the mag, I stopped at 5. I did not experience any misfeeds when I loaded 5 pellets, but occasionally I had problems with 6 pellets. So stick to loading only 5 in the mag.

RWS Superdome pellets loaded into the magazine

Loading the rifle with the auto-loading system is well… automatic! Just cock the rifle as you normally would and the pellet holder slides up, the magazine rod pushes the next pellet into the holder and when you close the rifle, it pushes the pellet holder in line with the barrel and combustion port. It may not be fancy, but it works! Take a look at the photos below to see the procedure. Also, as with the RM200, Mendoza uses a “locking” barrel with a fixed bar to hold the rifle in perfect position every time.

The magazine is loaded and the pellet pushing arm is engaged with the pellets to move them forward as the rifle is cocked. Having too many pellets in the mag will cause this to put too much pressure on the pellets deforming the skirts and causing jams. Also, once loaded the only way to get them out is to shoot the rifle. Don’t leave them in the mag and the constant pressure will eventually deform the pellets and cause them not to load.

As you cock the rifle, the pellet breach is allowed to raise up and the pellet slides into place.

Fully Cocked. Noticed the notch at the end of the barrel that matches the barrel rest in the next photo.

A feature that I’ve only seen a couple of times, the barrel rests on the metal bar shown at the bottom of the photo. This ensures that the barrel returns to a secure position every time.

As the barrel is closed the prongs at the end of the barrel push the loading breach down with the pellet that was loaded from the mag. The notch on top of the breach prevents the next pellet from moving forward until the barrel is cocked again.

Fully loaded, cocked, and ready to fire.

Now that we’ve explained how the rifle loads itself, how does it perform in real life? The short answer is that this rifle proved itself to be a moderately powerful, extremely accurate rifle. What it took to get to this point will take some time to explain.

As I mentioned above, the tag boasted 924 FPS and I was very excited to test a .22 break barrel that could generate that kind of velocity. The first few shots were in the 900 and even 1000 FPS range with Crosman Premier pellets. The down side is that the rifle was dieseling badly. So much that I thought for sure one of my neighbors was going to call the cops for me shooing a .22 in my back yard. Much like the KralAv rifle we looked at recently, the velocity was all over the place. One shot would be 900+ FPS and the next would be down around 600 FPS. Frankly this was very frustrating to deal with, but I just kept manually feeding it pellets. Eventually, after about 500 pellets, the rifle settled down and the velocity stabilized at the high 600 FPS range. This was a real disappointment. I figured that 900+ FPS was a lot to hope for in a mid range break barrel.

Now that we’ve got the dieseling under control I went to work learning how to use the rear peep sight. It did not take long for me to fall in love with this sighting system. Unfortunately this is also were I ran into my second problem. I had to adjust the sights to the extreme right and to the lowest most setting to get close to the bulls-eye, and I was still shooting high and slightly to the left as my shot groups will show. Shooting a little high is not a problem, I was only shooting at 10 yards so I know that it would be more on target at 20 and 25 yards, but not being able to get the shot centered left to right, was a real bummer. I’m tying to get with the manufacturer to see if there is a resolution to the problem. I could mount a scope, but that negates the usefulness of the rifle and the unique open sights.

Close-up of the rear sight. Notice that I had to move it all the way to the right.

With the sights adjusted as best I could, I started looking for just the right pellet. I knew the RWS Superdome pellet would work well, but I wanted to give some other pellets a try. Bottom line is that if you like the Mendoza rifles, buy stock in RWS. I found one other pellet that grouped almost as well as the RWS. The BAM 100% lead precision wadcutter pellet was a surprising 2nd place. I did not try using them in the auto-feeder because I know they will jam. The 100% lead composition means they are very soft and as they go through the barrel, they really squeeze into the lands and grooves producing excellent rotation and stability. They also seemed a bit oversized which is necessary to shoot well in the Mendoza barrels. The following shot chart shows four different five shot groups shot from ten yards. The RWS is the winner, but only by .12 of an inch. All of the groups were shot with open sights.

Different pellets matter. These were all shot with different pellets from the same rest, hold and distance!

BAM 100% Lead Precision Wadcutters.

Still the king of the hill, the RWS Superdomes delivered the goods with the RM2000.

RWS Superdomes, 14.5grn
High – 674, Low – 663, Average – 667, Difference – 11 FPS

BAM 100% Lead Precision Wadcutters, 13.9grn
High – 671, Low – 667, Average – 668, Difference – 4 FPS

So in summary, the Mendoza RM2000 shoots .22 pellets not at 900 or 850 FPS, but at a respectable 670ish FPS, which is a 100 FPS jump from the RM200. With a price at nearly $195, you’ll have to ask yourself if 100 FPS is worth the $85 premium over the RM200. It definitely has the accuracy and power for hunting small game, but there are a lot of good, accurate rifles that generate the same knock down power for less money i.e. the BAM B26. The unique features of the RM2000 such as the auto-loading system and the rear peep sight, make it a very interesting rifle, interesting enough for someone like myself to buy one. If you like shooting with open sights, then this may be just the rifle for you. I found that with the open sights, if you can see it, you can hit it. On my one hunting expedition with this rifle, the squirrels were all out of town at an acorn convention, but the dreaded pine cone monster was everywhere, so I used them for practice. This is where I really decided that even though it did not shoot as fast as reported, and even though the sights were not perfect, it was still one heck of a rifle. I’d like to see it priced a little lower than $195.

Next up is the Crosman NightStalker Tactical. The NS Tactical really impressed me. Check back to see how this awesome gun puts lead on target EVERY time!

Written By,
Rick Eutsler
Editor / Owner
Copyright 2007, Dog River Design, LLC – All Rights Reserved.
For reprint information, please contact Rick Eutsler, Jr.

  • Hello everyone,
    I am new to here and thank you for sharing your knowledge.

    I am interested in purchasing Mendoza RM 2800, can anyone tell me more about this rifle?

    Many thanks

  • Hey there. I believe the 2800 is very close to the 2000, but I’ve not put my hands on one yet. If I can be any help, just let me know.


  • Hello Airhead,
    Thank you for your reply. yes, I thought the 2800 should be very close to 2000, apart from the stated power 950 fps and the different style plastic stock. however, when i read through the specification which provided by Pyramid air, it said the trigger pull is 5.5 lb not like dual trigger 2.5 lb as 2000 has.

    I quite like the look and unique rear sight of Mandoza RM. and wish to buy a .22 cal for open sight hunting. the rm 600 seems to offer good power too 950 fps (giving the fact Mandoza seems over-rating the fps quite a bit, so i guess the true fps will be around 750~800) But then again, RM 600 seems only have normal rear sight (like other brands rifle) is that correct? and not a multi-shot.

    I also heard a horrible review says the synthetic stock of Mandoza was actually painted on cheap wood. well, I guess that shouldn’t be possible, but just want to ask if anyone who has experience of Mandoza synthetic stock, how good it feel etc.

    Sorry for so many questions, and thank you very much again

  • Hello Again.

    First of all let me say that I really like the some of the Mendoza line for their accuracy and price. The RM-200 is the best example of that. When you start getting into the $200 price tag, you have a lot of options like the CFX in .22 and RWS 34, and another personal favorite, the BAM B26. (the BAM B26 is my overall “best pick” for a Chinese / low cost break barrel.)

    With regards to the “real” velocity from the Mendoza, you’ll only get that after about 250 to 500 pellets. It takes that long for the gun to stop dieseling and settle down. The open peep sights are really nice “if” you can get them to line up. I had some problems with my review gun. I’ve heard that I’m not the only one that has had such issues. Again, the BAM B26 has awesome open sights, can knock a squirrel off a branch at 20 yards, and likes cheap Crosman Hollow Point Premier pellets. I’ve got to update my review on the B26 as they recently upgraded the spring and it gets in the mid 700 FPS now.

    As for the “synthetic” stock. I have the RM-200 in grey “synthetic” and it sure feels like painted wood to me! With that said, I LOVE MY RM-200. It may not have all the power of some other rifles, but I’ve learned how to take down small game with one shot kills. In populated areas, I actually prefer the RM-200 because the pellet stays in the game rather than passing straight thought like my B26. (B26 with RWS hollow points passed long ways through a squirrel at 15 yards)

    Anyway, I hope I’ve answered some of your questions.

    Please let me know what you decide and how it works out!


  • Hello again,

    Thank you so much for your reply. Yes, BAM 26 is truely a affordable quality gun at its price. I had one actually, the power wasn’t much less then my norica marvic gold .22 (claimed 800~820 fps). The only problem i had with B26 was the stock eventually cracked, and the powerful dropped quite a lot, maybe was because the spring broken or seals died etc.. and I have no ideal how to fix them. what a pitty. I am now also interested in getting BAM 40. I think BAM 40 has better overal quality then Mendoza RM 2800?

    Apart from the B26, I also have gamo shadow 1000 (.177) Gamo Hunter Extreme (1.77) and Norica Marvic Gold (.22) amount all the above, I found Norica is most reliable, with good power and accuracy. I have a bit problem with my hunter extreme regarding to get the accuracy as good as my norica, I think the size, weight and obvously the poor trigger pull cause my accuracy problem.

    I normally hunt in farms, manily rabbit and pussoms. so I guess the range and power are quite important. I admire your knowledge in air guns and do feel really lucky to find your website.

    Now I am in middle of process in deciding whether I should go for RM 2800 or BAM 40, and what caliber I should choose. if choose rm 2800, it going to be .22 thus shorter fire range, and open sight will be fun to try. I used M-14 back in my military service many years ago, normally shot at 300M with open sight, that is why i am considering try RM 2800. I know BAM 40 doesn’t have open sight at all, in your opinion, will that be best to choose .177 or .22 in BAM?

    I am in New Zealand, almost everyone love hunting, and airguns are very popular here for small game hunting. In here, there is no power and special limit for importing air guns.

    We don’t actually see too many BAM in here, and as far as I know, many people here actually want them, but purchasing from internet is always hassle (quality, warranty etc) and cost more (shipping and 12.5% GST tax if total value (goods+shipping)is above $290 USD or 400 NZD. However, as I am also in trading business I believe some low-medium priced rifles with reasonable quality will be the good seller in NZ.

    Yes, I will be very interested in getting more of these options.

    Thank you very much


  • Evan,

    I’m sorry to hear that you had that much trouble with the B26. When did you get it? I communicate with the folks over at BAM pretty often. It is possible that I can get you the replacement parts or at least point you in the right direction if you like.

    I’ll tell you that the B40 .22 is one awesome rifle. I like the .22 over the .177 any day. I’ve got both and the .22 is more accurate over a longer range. In fact I was shooting mine this afternoon. The difference between the B40 and many other springers in significant. The weight and balance really makes it easy to shoot. The only down side is that I could not see carrying that all day as a hunting gun. With a scope mine tops 13lbs.

    If your not in a really big hurry, you may want to consider waiting for the Crosman Discovery. I’m on the short list to get one as soon as they come available. Crosman worked with Tom Gaylord to come up with an affordable PCP rifle that generates an honest 900 FPS in .22 with standard pellets. I’ve put all my purchases on hold for this to come out. Retail is 399 for the rifle and pump, but I believe PyramydAir will have them for a little less.

    Too many choices and not near enough time or money!


  • fabio seixas

    Salutes from Brasil.
    Regarding the Mendoza Rm2800 peep sight I’m experiencing the same problem, the windage regulation has to be adjusted to the extreme
    I’ve been trying to contact the manufacturer but with no success.
    May be some of you guys could help me with the problem?
    There are only 3 Rm2800 in my country and we all are having the
    same problem.
    Thanks in advance

    • Wish I could help… I took off the peep sight and mounted a scope…


  • fabio seixas

    Amazing. Just installed the open sight produced by the Mendoza
    and the problem was solved. Guess it must be something wrong in the
    manufacuring or assembling of the peepsight itself.
    The gun is back on target again, but still cant get in touch with
    with the company.

Click here to Support
 width=Rick’s Go Fund Me

We are working with the Hospital to work down the ridiculous and obscene bill they say I owe.  We hope to have a resolution soon.  In the meantime, I’m back to work making content for airgunners!  Thank you so much to all those that have reached out and shared their support.

Join The AirgunWebTV Newsletter!


Click Here!

AirgunWeb Archives
Downloadable Targets
  1. Pellet Size Reference Target - general 4 up targets with size reference items
  2. Size reference target 5.5" x 5.5" with crop marks - for Tech Force "silent pellet trap"