Best velocity for .25 cal JSB 33.95
I wouldn’t dare take this topic to any random forum. The reason being, every gun from every manufacturer has variances that will impact pellet performance. And every pellet has it’s caveat. You’re all aware of what I’m talking about, so I’m not going to go into a dissertation regarding physics, aerodynamics, and alloy properties. I’m focusing in on one pellet. The JSB 33.95gr pellet in .25 caliber. The reason I like this pellet is because I’ve personally found it to be the most consistent across the board. What am I talking about when I say consistency? Well, as I said earlier- every pellet has it’s caveat. Some pellets are are fast, but not accurate. Some are heavy hitters but only good for short distances. You have domed, wadcutters, and field point. Some are so bad, they should probably never be manufactured in the first place. They all fly through the air differently, and each gun sends them off differently. I have found that the JSB 33.95 gr pellets are the best, middle of the road pellet there is for my gun. The reviews about the pellets don’t lie. They seem the most uniform in their shape. Their aerodynamics make them accurate close and afar. Due to their weight, they are deadly upon impact. Then again, due to their weight, there can be much hold over to compensate for distances. But all in all, this pellet seems to be the best performer for me. So here’s the magic question……
If you’re looking at this thread, you more than likely own a Condor or a Condor SS. If you use the aforementioned pellets, what have you guys found to be the best FPS to maintain accuracy without “spin off”. And what I mean by “spin off” is, if the pellet is traveling too slowly then it becomes unstable in flight, and it spins off. If it’s traveling too fast (supersonic), it flies faster than it can displace the air in front of it. This causes turbulence, which again, causes instability in flight, and again the pellet spins off. So there’s definitely a sweet spot for these pellets. So what is it? Is it 850 fps? is it 900fps? 950? What is the consensus? I have an inline constant air pressure regulator between my bottle and the Condor valve assembly. It gives me the ability to release very controlled and precise amounts of air, which in turn eliminates the normal bell curve. This in turn allows for very controlled FPS of pellets throughout the shot string. So I have the ability to dial in the FPS I want with a variance of + or – 7 FPS throughout the entire shot string.
So in your personal experience….. Experience using chronographs and targets at various distances, what is the magic number? What is the sweet spot for these pellets?
Thanks guys
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My 24″ .25 barrel is a TJ liner, so no worries about the barrel narrowing as on the LW factory AF barrels.
I’ve “heard” that you don’t want to shot cast bullets from a standard LW Condor barrel. The reason being there is a .02″ choke over the last inch of the barrel. I looked into this once and spoke with some people that have switched over and upgraded their guns. They all say the same thing. Pellets love a choked barrel, but bullets HATE a choked barrel. That’s why when guys switch over, they either order a custom barrel with the choke removed, or the lop off the last 1″ of their barrel and get it re-crowned by a gun smith. On the higher end conversions, they even use a different twist rate than the standard LW Condor barrel.
I want to love the 25gr JSB pellets, but every time I get a tin of them, 1/3 of them have deformed skirts. I know the physics behind the gun will compensate for some of this. The air released through the valve will slightly balloon the skirt to seal inside the barrel, and the choke will re-shape the skirt slightly as it exits, making it more uniform and consistent. But I just can’t get past the issue that I’m not confident in using them from the get-go. I know you can source them out and hand pick the best ones (and I do). But after you pay $26 for the pellets (shipping included in the price), you don’t expect to have to discard 100 of them. I’m confident when they leave the factory in the tin, they are pristine. It’s the manhandling that takes place during shipping.
Just frustrating. That’s why I like the 33.94gr. The skirts are visibly thicker. And this diminishes the the aforementioned qualm I have with the lighter pellets. Maybe I should just get several types and play with the gun. If I go to one of the internet Airgun stores, I can look at pellet shapes and maybe find a lighter pellet that isn’t so susceptible to deformation.
Tell me what you guys think.
Right around 900 out of my 24″ barrel Condor. I swapped the 18″ SS barrel and tried some .25 caliber bullets/pellets.
I have a Talondor Bounty Hunter .25 with an 18″ barrel. I shoot the MKII 33.95gr pellets at an average of 848. That average is of 25 shots and it stays within 2.25%. It is very accurate from 20 – 70 yards. Now with that being said, I don’t know if this is the optimum velocity for these pellets. I do know that it works very well for me, not so good for the groundhogs though. My targets at those distances show the same type of holes in the targets. It doesn’t show any instability as far as I can tell. I have shot empty 12ga hulls off of my target stand consistently at those above mentioned distances. I haven’t tried it any further yet, but will come spring. I am going to try the ” Nothing Under A Hundred ” long range club over at the GTA once I stretch it out some more. I believe right around 850fps is a good place to be.
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I have had good success in shooting NSA slugs in my AF LW barrel. I went to NOE and got some airgun push through sizing dies and size down to match the choke of the barrel. It is alot more cost effective to invest in the dies and press around $100 or so for everything.