Sniper rifle w/ PDI springs reference guide

[CDN_Stalker]

Ok, since no one here has any quality info regarding these things (I've had my CA M24 for almost two years now, and any info I got concerning upgrades has come from elsewhere, NOT anyone on here.) Not bitching, just stating a fact is all.

Anyways, I just got my new upgrade parts (PDI 300% spring, Guarder Ultra Light Aluminum piston w/head, 9mm Bearing Spring guide to add to my Prometheus 6.03mm tightbore) I figured I'd give a rough idea what this thing shoots at and how I dropped it down. I'll add, one Warmonger teammate has an APS2-SV which he will add the upgrade parts, as well as a PDI 200% spring, and another has a TM VSR-Gspec that is upgrading and installing a PDI 200% spring in as well, so we three can cover a bit of ground. Appreciate others with experience adding to this so we can have a relatively decent sniper rifle spring guide for others around.

So, my M24:

Guarder APS2 Ultra Light Aluminum Piston
Guarder APS2 9mm Bearing Spring Guide
Guarder APS2 Precision Piston Head
CA (Crappy Ass'd) upgraded steel cylinder
Prometheus 6.03mm Tightbore Barrel
PDI 300% Variable Linear Spring (whatever it's called, haven't seen the package in a while)

First couple shots I was able to chrony in low light: .2g BBs, got 555fps, 554fps and 550fps. Opened it up, cut the piston end of the spring off, then two coils, reassembled and got 520fps and 518fps. Cut two more coils off it, got 438fps. Still hard and gritty to cock the bolt (compared to previously, but MUCH easier than the full length spring), but it's not bad, pretty damn consistant and dead on from what I've seen (used to get 1/2" to 3/4" average groups indoors at 30ft with .36g BBs.)

So, as some have said, and others have not (one resource said a 200% spring in his APS2 got 650fps with .2g), there is the shit for all to see. I searched 300% and came up with all my 2 year old threads and few anwsers at all regarding what a 300% spring will do.