Does anyone remember me saying I was going to get an M200 spring to see how far my SVD would shoot? Well I fitted it this morning. 3 problems: 1) I can't cock it normally, I have to use a wad of clothing placed on the handle and press it down with the butt against the floor; 2) my chrono will not give me a reading, even firing 0.3's; 3) the tree I use as a dark background to test absolute range is about 100-5m away and the shots sail over it still on a flat-ish trajectory...
I'll take it with me to Skirmish next time I'm there because it's a quick job to change springs. I'm getting 388-395FPS on 0.3's with the hop set from my new airsoftpro.cz M130 spring and V2 enhanced piston with PDI W-hold rubber and 6.01x595mm barrel, which are good numbers considering the limit on 0.3's is 408.2FPS - I was planning on 400, to give me a bit of room for chrono variance (which is tight I know, but there are options), so my FPS-foo isn't working too badly. To get that I've dispensed with the stock spring guide collar and used the plastic one which comes with the V2 piston - it's only about 3mm longer but it's good for 5-6FPS more.
I haven't re-zeroed my scope yet so I can't say how good the new airsoftpro.cz steel barrel base is, but just aiming over the irons I can tell the gun jumps less when fired. I think it might be worth looking into putting some additional weight inside the handguards and I've been meaning to extend the stock by a couple of inches, to fit my arms better, so I'm thinking some metalwork on that, rather than just a shaped block of wood, may be the way to go.
Oh yeah, and I'm getting about 90m flat-ish trajectory with this new set up, which is easily 10m better than I was getting from my Madbull 6.01x590mm barrel with the W-hold rubber.