FPS on American Classic

[WhisperRidge]

I was wondering if the advertised 600 fps was after 10 pumps? does anyone know how many pumps produce how many fps..etc?

[1377x]

with a stock 1377 about 15x or use a 4gr pellet 10 should do it
most shoot 525-550fps 10x 7.9gr pellet

[Daysailer]

Here are my stock #'s with a 2009 and 2010 1377;

2010  RWS Basic 7.0 gr pellets
pumps..FPS
2.......298
3.......350
4.......391
5.......424
6.......453
7.......470
8.......491
10.....518

2009 same pellets
pumps..FPS
2.......308
3.......366
4.......412
5.......446
6.......476
7.......498
8.......515
10.....547

And here are a couple of links to the threads where I explain how I improved them
with fewest $$

http://www.crosman-air-pistol-owners-forum.com/board/index.php?topic=3688.0


http://www.crosman-air-pistol-owners-forum.com/board/index.php?PHPSESSID=1a96ceb76019c795c1bfc257a2339d3b&topic=4088.0

If you follow the links in the links, you will see these ideas have been used before
I found them in my research.

Have fun.....safely.

[Smaug]

Also, if you look up the manual for the first generation 1377 on crosman.com, you will see that this gun NEVER achieved 600 fps with a normal pellet. It was always in the 500 fps range.

Later generation 1377 manuals don't have the velocity numbers published.