Just did another string with no changes... Had 2-3 dip below 870, 859 being the worst, but most were in the low-mid 880's. Shot 70 was still 864! LOL Can't believe this thing has such a long shot string! I'm going to run a bore snake through the barrel a couple times, then post one more shot string. Hopefully, it's working those fliers out of its system. 3100 to 1500 psi for 70 shots, with an average of around 880 fps using JSB 18.1 grain pellets. Cannot believe it will stretch SEVEN usable mags out of a single fill!Hammer seems to fit plenty loose, so I don't 'think' it's getting stuck in there. Definitely no hammer bounce going on!
You might be getting the pressure tube too cooland causing the MDS hammer to stick. I would go back into gun and clean and ball hone pressure tube again and run NO lube at all. Also On war valves if you run to much graphite powder it will get pushed between valve stem and seat and cause sticking.
Quote from: oldpro on June 20, 2017, 05:06:27 PM You might be getting the pressure tube too cooland causing the MDS hammer to stick. I would go back into gun and clean and ball hone pressure tube again and run NO lube at all. Also On war valves if you run to much graphite powder it will get pushed between valve stem and seat and cause sticking.I took the gun back apart. Honed the hammer tube again, made sure the hammer wasn't binding, didn't tighten the Allen screw too tight... and even ground a little length off the threads, as they barely protruded past the brass in the hammer. Burnished the springs on the wire wheel, and hand rubbed Moly Disulfide dry powder into the hammer, hammer tube and springs. No real excess. Hammer works SLICK. Went ahead and drilled out the holes bigger in the front shroud mount/spacer as well.Put it all back together... and same thing. A bunch of good shots, followed by the occasional flier that is off 20-30 fps. I am beyond annoyed with this thing. I tried the 0.160" TP with no luck. For some reason, it just doesn't want to seal. I then tried the softer plastic TP that came with the WAR valve. Same thing. The WAR TP is longer and softer than the Hill unit, so if there was a sealing problem, I hoped that would take care of it. No real difference. Pressure gauge quit working as well, so that needs replaced. While it's depressurized, I may take the valve and regulator apart to see if they've picked up some silicone grease or something, that is making them stick. I'm at a loss... but I'm DONE with this thing for the night. Getting too aggravated. With the time, parts and attention to detail in this gun... I would HOPE that it would have no more than a 15-20 fps variance throughout the first few mags. Most shots are well within that... except for the odd fliers. If anyone has any ideas, I'm all ears! ThanksOh, Travis... I have two of your 58 gram MDS hammers. On one, the brass fell out of the nylon part. Any particular way they should be adhered back together? Thanks.
Mike just send the defective hammer back I will replace it or refund you no problem. As for the fliers if you have to much free flight Ive seen this happen. tomorrow when your brain has time to unwind call me and I will walk you threw how I would set it up and Im sure you will eliminate those fliers.
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