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azlann · January 31st, 2017, 15:42

I've been looking for the answer to the following problem for a while and on my google searches, this thread popped up the most with good, but sadly not really related info.

I have the following issue: whenever I load about 80 bb's into one of my magazines (FCC pmag or PTS pmag), the fps of the first two thirds of the shots is about 80fps lower than the second half. Meaning that only the last 25 or so bb's are having the 'correct' fps that my gun is tuned to.

I suspected it was due to spring tension since the stock systema mag only has this issue with more than say 55 bb's loaded. I went to town on the spring of one of the PTS mags. Chopped about 10cm off of it and got it to work as well as the systema mag.

I was wondering if this is a general problem, or just specific to my ptw. The gun is a MAX2 that was assembled two years ago. It has a stock hop unit with the orga tensioner and a 10.5" 6.10 orga barrel.

Does anyone have an inkling to what might cause this?

EDIT: looking a bit further, it would seem that this is the same issue as 'chopping', but then without actually destroying the bb. The nozzle getting stuck just results in fps loss. Could this be correct?

Thank you!

January 31st, 2017, 15:42	#461
azlann Trader rating Join Date: Jan 2017	I've been looking for the answer to the following problem for a while and on my google searches, this thread popped up the most with good, but sadly not really related info. I have the following issue: whenever I load about 80 bb's into one of my magazines (FCC pmag or PTS pmag), the fps of the first two thirds of the shots is about 80fps lower than the second half. Meaning that only the last 25 or so bb's are having the 'correct' fps that my gun is tuned to. I suspected it was due to spring tension since the stock systema mag only has this issue with more than say 55 bb's loaded. I went to town on the spring of one of the PTS mags. Chopped about 10cm off of it and got it to work as well as the systema mag. I was wondering if this is a general problem, or just specific to my ptw. The gun is a MAX2 that was assembled two years ago. It has a stock hop unit with the orga tensioner and a 10.5" 6.10 orga barrel. Does anyone have an inkling to what might cause this? EDIT: looking a bit further, it would seem that this is the same issue as 'chopping', but then without actually destroying the bb. The nozzle getting stuck just results in fps loss. Could this be correct? Thank you! Last edited by azlann; January 31st, 2017 at 16:10..