I was considering doing a bottled Prod, but it's so light that I don't want to ruin that.
QuoteThese P-rods with out any mods will accurately lob 30 gr. .22 NOE BBT cast slugs a little over 400 FPS and deliver killer energy out to 30 + yards BTW.Interesting, but where does the "killer energy" come from? 30 grains at 407 fps is 11 ft.lbs. 14.3 grains at 660 fps is 13.8 ft.lbs.
These P-rods with out any mods will accurately lob 30 gr. .22 NOE BBT cast slugs a little over 400 FPS and deliver killer energy out to 30 + yards BTW.
OK, I have four mags of pellets through the P-Rod; all at factory settings. This is without sights, pointing over the chrony from a foot.Hand pumping it from 800 PSI was a nuisance, but not too bad; due to the small air reservoir. Shooting just 3 mags and then pumping it up is the way to go, as there are fewer strokes the higher the pressure gets, even if they require more effort (I am heavy, and just drop my weight on the pump handle ) Also, the velocity variation over 24 shots between 2800 and 1800 PSI was just 25 FPS.Starting from 2900 PSI on the P-Rod's gauge, the velocity with JSB 15.9 grain domes started right at 600 FPS. By 2800 PSI the velocity had increased to 625 FPS. At 2500 PSI the velocity peaked at 650 FPS. Then it dropped back to 630 FPS by 1800 PSI, on the 24th shot.At 2900 PSI the report was surprisingly mild. The report increased throughout the string; rapidly from about 1600 PSI, where it was unpleasant. I stopped shooting at 1500 PSI with the velocity 600 FPS. Then went and pumped the P-Rod back up to 3000 PSI for a general leak test.The mag is hard to insert into the breech. I am sure this will ease up with use.I would like the report to be like it was at 1900 PSI. If the velocity could remain at 600 FPS over 3 mags, that would be OK with me. That would be 12.7 ft.lb. With the factory settings it is averaging 14 ft.lb over 24 shots.It seems to be set to a very usable velocity spread at the factory, so I am probably not going to mess with it for awhile. Perhaps try some 25 grain pellets for grins. That would shoot a bit over 500 FPS, which could be interesting, if it is much quieter. Sure, if I was going to shoot 30 yards, then closer to 650 FPS would seem like a better idea.I still can't get over how the barrel looks almost like a smooth bore. As long as all pellets are stable in flight... There was no change in gloss level from shooting 4 mags of pellets, so the bore seems to be as smooth as it looks, in terms of collecting lead. I am used to looking at the GM barrel of my .25 Marauder. That has proper looking rifling, but also seems to pick up a lot of lead rather quickly. Time for that to be fire-lapped .Happy with the P-Rod at this price-point. Handy little carbine.
If you turn the stroke adjuster in the hammer CW about an 1/8 turn at a time to shorten the hammer throw you can tighten the spread up over your 24 shots to get an even flatter shot string. Just go slowly and record the amount you adjust it so you can always go back to the factory setting if desired.
Quote from: buldawg76 on December 11, 2019, 10:31:15 AMIf you turn the stroke adjuster in the hammer CW about an 1/8 turn at a time to shorten the hammer throw you can tighten the spread up over your 24 shots to get an even flatter shot string. Just go slowly and record the amount you adjust it so you can always go back to the factory setting if desired.Awesome!The hammer spring preload and hammer stroke seem to interact. I can see how too little hammer energy just can't crack the valve, if the pressure is to high.I understand that the hammer stroke adjuster could push the valve open more or less far for a given hammer energy; yet, if the hammer blow is fast enough, would not the valve's momentum carry it further than it was pushed?I get the impression that folks tend to run very short hammer stroke settings, and mainly vary hammer spring.I wonder if anyone has a shot string where they vary only the hammer stroke to get an idea of what it does...Then, there is the flow control. I assume the screw on the right side of the receiver opposite the TP is the flow control?All that said, a 25 FPS variation of 24 shots seems pretty good for an unregulated PCP.
I ordered this stock from Tom West for my new P-rod. The quality of this gun really deserves better than that cheap plastic stock with too low of a comb. With the low price $230 we paid for these P-rods, the price with this Tom West stock is still about the same as the normal price for a P-rod. I learned he has a CNC machine he uses to cut these stocks.
How did you get hold of Tom West?
Quote from: UCChris on December 11, 2019, 01:24:57 PMHow did you get hold of Tom West?I think he use to hang out at the Green Crosman forum. Sold stocks occasionally on Ebay, under name "urg_thrash" or something close to that. I have one of his stocks on a 1720T.
How is the fit and finish on yours?Thanks.
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