[njsc]

Can someone tell me how the pdi spring rating system compares to the laylax? If I remember correctly laylax is meters/sec, correct? Thanks in advance for any help.

 

[njsc]

alright well someone told me on another board so if any one is curious pdi is in joules

 

[Livonia]

Laylax is in meters per second.

You are right about PDI, PDI SPR250% spring 2.50J=519fps

Here is a link to a very respected airsoft group, they made this for joule calculations.
http://www.cimmerians.org/FPS_Converter.html