Another thing. American Consumerism Does Not Apply in Airsoft.
There are no standards in this industry just a guide line that is loosely followed at best. A true M130 out of the package is not that common. The only way to get this is if you buy a hard spring and the rating is true, like from a Japanese supplier.
Unlike a M130 made from a soft alloy where it needs time to settle to the M130 rating. Thus you overstress your mechbox and it gives you a false positive until the springs settle. This was the issue with SystemA springs from 23 years ago. It took the spring about 2-3 weeks in a compressed state to "settle" down to their spring rate. When newly installed a M100 shot like a M120...people were like WTF? Maker never mentioned that you had to compress it to settle it. Events like Savage Garden 3 really messed users up because they thought they installed a M100, but when they chrono'd they were 40fps over..."but I bought a M100"...
Then you just have low end makers like Matrix Springs which is a Evike House Brand...they are just bad. I mean...who would buy a spring that has a FPS rating like this:
235% (M130) ~420~500 F.P.S.
Sadly...thousands...a M130 should never hit 500fps. That is a M150...but the alloy...soft...cheap...and end users not know the details of the spring...its a bad cycle that is not good for the end user...but great for the seller.
