Hi,hello everyone I'm new here; let me ask you about my RWS RM2000[Mendoza];They said the barrel is 18.5 inchs,but I don't understand is that you can drop a pencil 6.5 inch through the bore [muzzle brake] which means that the actual rifled barrel is only 12 inches? After shooting 150 shots and cleaning the barrel I tested the average velocity using a chronometer for the following pellets:
RWS-MEISTERKUGELN========725FPS
RWS-HOBBY================745 FPS
RWS-SUPER-HOLLOW-POINT===755 FPS
Overall, it's a good rifle (for the price) [$167.00]
Thanks James,but is not too short the barrel with only 12 inches? maybe with [real]16" or 18" barrel can reach the 900fps [like they advertise to call the attention of the public];thanks.
Research has shown that: spring powered airguns usually accelerate the pellet to its' maximum velocity in the first 6" to 8" of travel; after that; velocity does not increase, in fact it may decrease. Having a 14" compared to an 18" barrel in a spring powered airgun is not a disadvantage. The shorter barrel will produce as much power as the longer one. On the other hand, the loss of weight in the shorter barrel can be readily appreciated in a sporting gun.When it comes to accuracy, the argument swings to "lock time" - the time between pulling the trigger and the pellet leaving the barrel. Because spring airguns have the infamous "double recoil" caused by spring rebound, the shorter the lock time, the less chance there is of the shooter moving off target. A shorter barrel gives a shorter lock time. Following these arguments, a carbine loses nothing except weight over a traditional full length barrel. The only slight disadvantage to a carbine is possibly more noise - the compressed gasses leave the carbine barrel at slightly higher energy than those from a longer barrel and can be noisier. If you want a lighter weight, easier to carry airgun and the possibility of a little more noise is not a concern, get a carbine spring airgun. [only concern to spring powered airguns ]
A friend has a Mendoza that he brought over with the same barrel question.
The first time he went to clean the barrel with a cleaning patch, he discovered that the start of the actual rifling in the "barrel" was over an inch below what would normally be the crown of the barrel.
On inspection, the actual barrel was inside a tube or shroud to make it look longer and add leverage for cocking.
We ended up measuring this distance to where the actual barrel started and cut off the tube adding a JM Apex muzzle brake. Looked and balanced much better with obviously no compromise in FPE or accuracy.
It's like the Diana 48 and 52 with their barrel sleeve to make it look thicker. In this case on this Mendoza RM series, it makes the barrel look thicker and longer. Cheap trick I'm sure saves them a few dollars per rifle.
You get what you pay for, or should I say, you end up with what you don't pay for. LOL.
JonB,I don't think you understand the Q,I didn't Complain about the rifle,Only ask about the Mendoza barrel length;and about[You get what you pay for,.LOL]
the Diana over rated the velocity TOO.
I don't think that the Diana 48 and 52 [at around $380.85 each]get more velocity or power than this BURRITO cal.22 LOL.
I wasn't poking fun, your post title caught my attention and I shared an experience we had with a two year old $150 Mendoza rifle. The rifle is accurate with a good looking piece of wood for the money.
I'm always curious or amused or both at how manufacturers cut corners in design and materials trying to keep their margins up and the US market eats it up regardless. This could be airguns, audiophile gear, cars, whatever. I observe it in my own industry to a certain extent with the new Chinese imports trying to make a market stand against established professional equipment.
The Mendoza rifle my friend purchased and a good number of late model RWS rifles are a good example. Small details like a metal trigger, full length barrel, rubber butt pad, white outline spacer on mid to higher models, end cap, checkering, decent looking beech, etc. are things I believe a manufacturer can afford to build into an air rifle once it retails for a certain price and still make a healthy profit.
Just my observation and opinion. Webley and Air Arms somewhat pushed their pricing through the ceiling over the past two years but the German Beeman imports still look like the best all around bang for the buck out there in a good quality airgun. Especially the R7 and R9 models with Rekord trigger.
I wish Diana would start producing rifles like they used to and better but that is not where the market is for them today. I enjoy looking at and shooting my Diana 75 very much. Well done entry level match rifle in my opinion. My 52 is an excellent rifle but I have over $1,000 invested in it. Out of the box it leaves a lot to be desired in its price range other than brute force FPE. JMHO.
My friend's Mendoza does shoot very accurate out to approximately 35 yards. Once he figures out how to improve the trigger it will be a great inexpenisve airgun. I like his stock design better than a lot of more expensive rifles. To each his own. LOL.