spent some chrony…..257 MORE TESTING
…yeah, I know, not nearly as exciting as Cedric, Doug, RC, and any other limp dicks shooting nearly 1/3 miles with their 1/4 bore air rifles but it is what it is and having six kids and three jobs I’ll take what I can get. Besides, I think this is important/quality time spent prior to accuracy (especially long range shooting). I was able to figure out a base starting position for my first “range sessions”.
I first started out with around a 2 preload (power wheel), but keep in mind this PW preload is nothing like the stock spring AF preload. My SP was 3100 as this is what was left in the guppy tank. First shot was 1060 with the 74 grain lymans (the only bullet I used for testing today) and by shot four I dropped into the 1005 fps range so this seemed to be pretty hot so I think I will explore this setting when I have 3200 psi in my guppy tank tethered. If not tethered it will be too much power for the small af tank for any number of shots…but nice to know it can hit 187 fpe for a few high power shots!
I added three more rotations of preload and this proved to be way to much. It made the cocking more difficult and I did not want to stress the breech handle as I have been known to “mongo” a few bolts in half back in the day when I was on the quest for 22xx power. Besides, there was no benefit to the higher preload as my first three shots where 1039, 1037, and 1021 fps (under powered from the lower preload).
Next I turned it down one rotation and it gave me a 1044, 1035, 1032, 1028 fps on a 3050 sp. This is where I think it was best.
I retrieved my big tank which had 3200 left in it so from here on I started with 3200 psi.
I tested this by turning it down another rotation and as expected on a 3200 SP (the ideal SP as recommended by Doug 3200/3300) I had some “valve lock” with 1002, 1005, 1006, 1026.
Back up one full turn and on a 3200 psi SP I had four nice shots of 1047, 1044, 1036, 1037. I will shoot at this setting while tethered to my guppy tank with 3200 psi in it and I will see how many shots I can get before my tank pressure stops to drop and my SD is compromised. I have to say, I never shot any string with a stock condor that produced an SD of 10 fps or less so Kudos to Doug for “blue printing” a fine rifle! 😎 On average it consumed 75 psi per shot.
Next chance I get I will polish the barrel, then set out for some accuracy testing (time permitting). It was nice to put in some trigger time today (finally). Looking forward to the future and joining the “pepsi challenge” with the rest of you lunatics!
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Viewing 9 replies - 1 through 9 (of 9 total)
Joe,
That’s seriously AWWWWWESOME SIR! ABOUT TIME YOU SHOT THAT DAMNED GUN……lol! Just joking, trust me, I have only one kid but I can relate to how you have NO TIME anymore. ME EITHER!
But as far as Limp Dicks go, out of the group of us shooting long range, i’m afraid that that title goes to RC. Him shooting to 608 yards makes up for what he lacks elsewhere in distance (length)…………lol!
Put in some more time with it today. Never quite managed a 10 fps climb but as I was testing I wasn’t too concerned as this long range rig is meant to be fed a steady stream of HPA, soooooooooooooooooooooooooo I ended up on a half turn of the power wheel less than where I left off (the position that was getting me 1040 from the start). Half a rotation down from there started me at 1024 and I was able to get five shots in a row, two times, with an SD of only 7 :8:
Did some tuning on my 18″ barrel .251 (never retuned it after I took out the 24″ barrel) and I settled on a SP of 2800 psi with a nice bell curve getting me a sweet amount of 940’s in the heart of it!!! 50 fpe is just fine and so accurate to boot (3/8″ ten shot group @ 25).
Decided to try two 3 shot groups with the .257 @ 25 as well. Man she sure does “bark” especially because of the echo off of my privacy fence. Both groups were clovers. After shooting these two groups I decided to forego polishing the barrel as she is already showing signs of being a shooter :4: Next stop….50, 100, and 200. Good night!
Start at 2 and work your way down a couple of numbers at a time. If you spend the time you can get it to go up 10 and back down 10 in 6 shots.
I’m glad you like it.
a six shot power curve…how’s that for air efficiency 😆
Will do Doug. I was just stoked to see it being so close in deviation!
Maw, Yes, Doug provides a few Top Hat shims for tuning to your liking so I’m sure you could get more shots from the stock tank if you wanted.
Knife, yes. They were cast for me by Josh (RJ porter). Earth to Josh, come in Josh? Need some lead for casting, do you read me?
You need to turn down the PW until you get a curve. Just a couple of numbers makes a difference.
Start at 2 and work your way down a couple of numbers at a time. If you spend the time you can get it to go up 10 and back down 10 in 6 shots.
I’m glad you like it.
Man oh man that is one powerful weapon, is there any adjustment on the valve, maybe for fine tuning?
80, are those bullets the Lyman 257420’s? I found a used die for sell on Amazon for about 25.00 less than retail. Hope it is in good shape.
Knife
Mike,
Doug really did some precision work on this rig. I am pleased! Can’t wait til my next session! 😀
About time you shot that puppy 80! Looks like it really came together NICE!!! 😀
Knife
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That’s seriously AWWWWWESOME SIR! ABOUT TIME YOU SHOT THAT DAMNED GUN……lol! Just joking, trust me, I have only one kid but I can relate to how you have NO TIME anymore. ME EITHER!
But as far as Limp Dicks go, out of the group of us shooting long range, i’m afraid that that title goes to RC. Him shooting to 608 yards makes up for what he lacks elsewhere in distance (length)…………lol!
Hell, as much as he shoots how can he have time to get it up, little or not 😀
Yes, it certainly was fun. I figure I have around 70 shots through the barrel now. Not sure how many Doug ran through, and or you, but I am going to look at the bore next week and I will most likely polish it up. I am just about down to 3200 in my big CF tank so once there I am going to head to the range so I can tether it to the rifle and shoot for accuracy at the same pressure (the poor mans regulator, lol).