How many pumps is best?

[Magnum]

I am finding that 4 to 6 pumps seems to work best for my accuracy and maybe 6 is optimum although it may only be psychological for me:)  I am curious to know if  anyone else has  got scientific about how many pumps/FPS  is optimum for the 1377  ? below is a chrony test I did a few months back. Tony



"This is Quote from a post I did back in august" = Thought this was interesting info for us "1377 people" that don't mind the pumping part:) I fired 5 shots through crony and got the average FPS, using different amount of pumps . note also that the spread was no more than 18 fps max for all strings most were less. 2 pumps=331 fps, 4 pumps=432 fps, 6 pumps=508 fps (best consistent), 8 pumps=558 fps, 10 pumps=585, 12 pumps=609 fps, 14 pumps=637 fps, 16 pumps=654 fps.
The 1377 is great iron sight air pistol and very accurate, way more accurate than me:) I do not believe the standard sights on the 1377 allows it to reach its full potential! So I am going to order a steel breech replacement from crosman so I can experiment with better iron sights and see what happens:) Hope see more 1377 people in the multi pump target arena:) Tony.

[gamo2hammerli]

Between 5 to 7 pumps is best for me....actually I think 10 works too....but I'm too lazy to pump the pistol so many times for paper. )

For my 1377 I notice if the pumps are less the shots seem to hit left....9 o'clock position.....as the pumps increase, the shots goes toward the right.  Haven't chronied it yet.

[kp4att]

THE RECOMMENDATION IS ONLY A MAXIMUN OF 10 PUMPS.