[ILLusion]

Originally Posted by JAVP

You should send it to Arnies. Many people must find this info helpful, and everyone will appreciate your work

Done.

Originally Posted by Skruface

Brian, if you're still looking for a Brand New PDI 170% to test, I have one at my place still in unopened packaging. 8)

Thanks for the offer, James, but I actually have one incoming. Cheers.

Originally Posted by rellik

Just wondering if you used two or more identical springs for each test. Probably not, as that seems too much to ask for. What i'm getting at is the possibility of an mispackaged spring. From what I can see, the PDI 130% and 140% is basically the same spring?

Were all the springs new when test?

Also, I think it should be noted that we aren't going to get these figures with a stock gun upgraded only with spring and bushings.

Anyways, great work. This will really come in handy when comparing springs. A+ 8)

All springs were brand new (or very near brand new). Only one sample per spring was used... except for the Top Power 170%. The actual result posted in the chart is from a brand new one, but I had also taken results from one that was 1.5 years old with ~10,000 rounds through it. The results were almost the same as the brand new one.

I didn't see a point in testing two springs as it would take me forever to acquire springs from different batches to test the spread.

As for the mispackaging of the PDI 130% and 140% - I noticed this anomoly as well and it confirms reports that I have read from the past year. The material of the two springs seems to be different, and the 130% was not engineered properly to compensate. The PDI 130% does look like one of those springs that will hold it's velocity for a very very long time.

And you are right. You won't get these results with an otherwise stock gun. Although I am sure you can get close to some of these results with just a longer barrel.