If you’re happy with below 18 grain pellets the small plentum is fine . My Dreamline GRS has the larger plentum and I can get more out of it than the DRS with reg on 110 bar. But I have kept it tuned for 15 grain Hades at 915 fps which shoots better than I could ever want out of a pellet shooter. My DRS out of the box shot the 15 Hades at 950 fps but they didn’t group worth beans . Probably would do better slowing them down some where between 880 and 900. But I bought this DRS to shoot heavy pellets and light slugs which it does but the shot count sucks and I would like a little more velocity. We need a slightly bigger volume plentum for the classic 600. I said bigger volume , not a larger sized plentum. If it doesn’t happen maybe I’ll tune the DRS for whatever light pellet it shoots best and tune my GRS Dreamline to shoot the heavy stuff. I have plans to make my own GRS stock without all the adjustments for this DRS.Tom at HPP tested the .22/600mm DRS I have coming. He said it's shooting 18.1 gr JSBs at a consistent 57 shots at an average of 909 FPS before it dropped off the regulator. That should work for my needs, but it will be nice to experiment a bit and see what it will do. If the reg pressure is preset at 110BAR, I would think I should easily get more out of it, even by just raising reg pressure to 120BAR.
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