I gather you or your buddy don't own a chronograph? It would be a much more useful purchase than a new gun, IMO.Shooting organic objects for penetration comparisons is wrought with fuzzy variables. A round surface has a huge effect on penetration. An equal-energy / cross-sectional density hit can range from heavy penetration to a glancing blow - just ask armor makers. Any hit that made the coconut move, even a little, would bleed a large, highly variable amount of KE.Maybe the 350 Mag pellets hit harder parts of the coconut shell? Did you control that none of the penetrating shots gained penetration from earlier hits? etc. Is the 350 Mag worth rebuilding? Deffo, yes. But first you should make sure it needs rebuilding.With factory internals, about 3 000 to 4 000 shots is all the mainspring takes, just like on Weihrauchs. How close to that benchmark are you?A healthy .22 cal 350 Mag is in another category to an R9 /HW95 etc., as far as muzzle velocity / muzzle energy / penetration is concerned: 32J vs. 20J, or a 60% lead for the Diana. (I've extensively chronoed both, with factory internals).
Hey Ike/Wes,The D350 should have way more power vs. a HW95 or HW80S.Likely just need a new spring, piston seal or both. - For the time being use someone else's crony and confirm the low velocity issue. Once confirmed, get a new spring/piston seal and tune, Question:Has this gun ever shown good power? The problem is not the platform, but the quality/condition of the internals.For more information - Talk to Hector ...............
In the "old" days - 1963 Sheridan Blue Streak ad I used to look at before getting my Blue Streak1" Penetration in soft pine at 25 yards
I believe the 350 has a gas piston power plant. It probably leaked out some of the nitrogen and that's why the power is lower. Hector can probably get you a new gas strut to replace it. It might even be rebuild able?Just looked it up and it is a springer not a gas piston which would make it easier to repair. ARH or vortex would have time kits for it.
Does anyone know how far the spring sticks out of the action tube on a 350 once it's decompressed? I'm building a spring compressor and I need to know how much travel the screw needs. I'm using a Chinese made drill press vice I took off the front part and the guide rods and I'm just going to screw and glue it to the board, I'll post some pictures when it's done, I just need to figure out how much travel I need👍
Quote from: Ike the GSD on February 19, 2024, 12:07:01 AMDoes anyone know how far the spring sticks out of the action tube on a 350 once it's decompressed? I'm building a spring compressor and I need to know how much travel the screw needs. I'm using a Chinese made drill press vice I took off the front part and the guide rods and I'm just going to screw and glue it to the board, I'll post some pictures when it's done, I just need to figure out how much travel I need👍 Hey Wes,I don't know if this helps, but my spring compressor uses the thread on a 6" Clamp to provide spring compression travel.I often use steel plates/wood blocks/delrin rod to shim the C clamps threaded end to reduce travel. Further, the muzzle end of my compressor is also adjustable so the barrel can be moved closer to the clamp.The barrel/receiver of a HW30 action is much shorter than a HW80, hence a compressor should be reasonably adjustable to be suitable for different guns.