Vortek now offers the PG3 kit for the Diana 350 with two options, one with a .128 diameter spring and one with a .135 spring, High output and Super High output respectively. Has anyone tried these kits?I have two 350's, one was detuned and the other is all factory, full power. I'm considering a PG3 SHO Kit for the more powerful of the two as it only has one purpose, but not sure the .135 spring will make it "over sprung". In my research .142 wire springs made 350's unpleasant to shoot, but to the best of my knowledge no one has tried a .135 wire spring. I figure the guides will help dampen things with the heavy spring. As is, the gun has between 20-21ftlbs of muzzle energy (in .177) which is more than plenty. It gets a steady diet of H&N Baracuda Hunters, not sure if upping the power would affect accuracy as they're pushed to the mid 900's already. Most shots are within 30 yards using open sights. In all reality this much power is better suited for the .22 caliber, but should I "go big" and push this .177 350 to it's limits? Also my Hatsan 135 QE .177 is out of commission at the moment, I much prefer working on Diana's, the only reason I'm looking at the SHO kit for the 350 is to replace the Hatsan in use. Just for those wondering why.
Interesting results. Seems vortek = high fpe. Re the OEM Vortek springs, as mentioned above, mine is definitely over sprung. With one coil clipped. If one wants closer to factory fps, I'm guessing 2 or 3 coils clipped. Left mind cocked overnight and now doing 24 fpe. In the future, it's factory replacement only for me, as my 350 never did buzz.
Zack,My 350 Mag .177 cal has never shot above 25 J, or 18.4 fpe. I don't think your "settled" numbers are especially low.