uh ...... people claim this from time to time about just about every brand.
Do you realize that when you load a syringe - that about 0.2 ml ends up being used just in the top part of the syringe and the needle itself?
Meaning ...
If you have a 10 ml bottle, and try to use it 5 times for 2 ml doses, chances are you WILL come up short.
When you "load" the syringe to that 2.0 ml mark for example, you just actually withdrew about 2.2 ml from the bottle to do it.
When you inject it - you inject the 2 ml. But there is some left in the syringe.
Don't believe me? Try this.
Take a new syringe that you can toss away - for an experiment.
Now, fill that syringe up to the about 2 ml mark.
ok, now pull the needle out of the water. Slowly posh the plunger down all the way - ok?
Now THIS is how you would have emptied that liquid into your muscle - BUT now watch this....
Now pull BACK on the plunger somewhat so that you get some air to get pulled through the nedele and into the syringe cavity.
Shake the syringe a bit, just a TINY bit .... now PUSH QUICKLY the plunger back down .......... did you see something come out? Liquid? Probably.
The reason this works is that after the first plunge, you are actually pulling air back into the syringe BEHIND the liquid that is left in there. Now, with that air in there to PUSH the liquid out, you can do a good job of cleaning the syringe cavity and needle out.
But you cant do that when you stick YOURSELF, because you cant risk pushing air into you.
So, sure, there MAY be some instances of some bottle slightly under-dosed. Granted.
But most "claims" about this are just do to ignorance, and guys not knowing how this works.
Chances are (unless the bottle is OVER filled) that you will NOT (for example) get 5 full 2 ml injections out of a 10 ml bottle of ANYTHING.
This is another reason why you should always plan your cycle head - and make sure you have at least some EXTRA gear on-hand.
Note: Smaller syringe sizes and needles tend to "hide" less liquid after the initial plunger, so for example, a 6 ML syringe with an 18G needle will hold much more than like a 3 ml syringe with a 25 g needle on it.