Oehler Chronographs

Discussion in 'Rifles, Bullets, Barrels & Ballistics' started by ccsykes, Apr 15, 2005.

  1. ccsykes

    ccsykes Banned

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    I have read quite a few posts that make reference to the Oehler 35P model. Does the three gates make a big difference over the two gate systems? I have never used a chronograph and am in the market for one since I beggining to shoot more handloads for groups at longer range rather than deer inside 300 yds. From the numbers that everyone posts, I am very interested in seeing what my muzzle velocities are; I aslo need the velocities for my new ballistics program too.
     
  2. brian b

    brian b Well-Known Member

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    Christopher,
    I have some qualities as a human being (some may dispute this) but one quality I lack in abundance is patience, and especially with a P.O.S. chronograph, I once had a shooters chrony and after futility and frustration I shot 35 to 50 rounds of good ammo through this piece of crap (not the sky screens but through this piece of crap ) I went and bought an Oehler 35p the next day (5 years ago) and have had a smile on my face evey day since.
    buy one and be done they are the best.........
    B
     

  3. 7Rumloader

    7Rumloader Well-Known Member

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    I am looking at buying one of these too just to really see how accurate my shooters chrony is. I have heard they can have big variations from oehlers! I was thinking about the model 48 I believe it is I dont remember now! Have you used one of these or know what the difference is between the 35 and 48? Thanks for the help in advance!
     
  4. goodgrouper

    goodgrouper Well-Known Member

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    I have lined up my Oehler 35 behind Brian B's and one other persons and they read within 3-4 feet per second of each other and that was just because mine was a little further from the muzzle. When I have tried this with other chronoys, they didn't get very close readings.
    Oehlers are the best. Basically, (and I hope this doesn't offend some people) I do not put much stock in any velocity reading that wasn't read from an Oehler. I have found that nine times out of ten, if someone comes to me and gives me a crazy high speed load that is 300 fps faster than what I have gotten with my Oehler, I ask them what chrony they have and it is usually an el cheapo chrony. If someone on here says they were getting such and such velocity and they were using an Oehler, I will not doubt them.

    Oehlers also have the widest skyscreens for shade, are made from the toughest polymers, can be set up on a 2,4,or 8' rod for accuracy, and are essentially two chronos in one with the 3 sky screen set up.


    The model 43 is a personal ballistics lab containing many more parts and pieces than the 35. You must have a laptop to run it while you are shooting. Check out their website. It is www.Oehlerresearch.com I believe.
     
  5. Brent

    Brent Well-Known Member

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    For the last several years I've had experience with two Chrony brand chrono's and Oehler's model 35P and model 43 PBL. To experience the pure exitement of muzzle velocities fluctuating 200 fps randomly between chronos of the same brand, and back and forth between the two, one need look no further than the Shooting Chrony!

    If however you can't stand that much exitement at range time and wish to shift your mental efforts into something more productive and leave this to an instrument worthy of your trust, look no further than Oehler.

    The three screen system Oehler uses offers a second chrono number (MV #) to to verify the first (primary) in the case of some sort of bad reading. The screen setup is situated like so; The stop screen is the farthest one on the rail, and acts to stop the timer on both independant chonos. The middle screen is the start screen for the secondary chrono and the screen spacing is half that of the primary chrono. The first screen nearest you is the primary start screen and is spaced 2, 4, 6, 8, 20, 40 feet or what ever length rail you choose from the rear stop screen for the accuracy you desire. Most people use a 4' rail.

    The way I look at it is, you are not paying for two chronos, you are paying for high quality and consistancy and reliability of one good chrono, the second chrono is free and just there for added benifit in some situations, it is a very nice feature however.

    The M43 requires a laptop as GG said and is outlined pretty well on Oehler's website. It uses the exact same chrono screens as the 35P and the only difference is the added features it has. MV wise, they have the same accuracy etc. and the 35P is not a downgraded version at all, but rather an upgrade in the sense I guess that you don't need a laptop to test MV on the 35P.

    You will not be disapointed in the Oehler but have something you can rely on for life.
     
  6. Varmint Hunter

    Varmint Hunter Well-Known Member

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    I've had 2 Chrony's, a Pact, and now own an Oehler 35P. Without a doubt; I should have parted with the money for the Oehler right up front and I would have saved myself a lot of money and aggravation.

    Just for the heck of it I put my buddy's Chrony (the good one with the remote read) directly behind my Oehler 35P. I shot several bullets from a few different rifles through the screens of both of them simultaneously. I expected the Chrony to read a few ft/sec slower because it was behind the Oehler. On average, it regularely produced readings that were 100 ft/sec faster . There was no way of knowing which chronograph was reading correctly and this bugged me to no end.

    I built a small wooden crate and shipped my Oehler 35P, along with the screens and bar, back to Oehler for testing. The unit was tested in their lab and found to reading accurately. So much for the reliability of the Chrony. /ubbthreads/images/graemlins/grin.gif /ubbthreads/images/graemlins/grin.gif

    VH
     
  7. 7Rumloader

    7Rumloader Well-Known Member

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    Thanks GG, Brent, and Varmint Hunter for the info! I will be buying one soon from the way it sounds. /ubbthreads/images/graemlins/wink.gif I had heard good things about them all around.
     
  8. ccsykes

    ccsykes Banned

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    Do you guys think it is worth the data collected to go ahead and spend 1800 on the Model 43 Personal Ballistic Laboratory system that includes everything. Or would that be overkill for what I am wanting. I started another post on the RSI system that is somewhat similar to this system. But the RSI system includes the ballistics program and it is only about 476 for the entire package which has the chronograph, pressure software, and ballistics software.
     
  9. goodgrouper

    goodgrouper Well-Known Member

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    I have never used the RSI, but it is probably a good unit by the way it sounds. The Model 43 has acoustic targets that "hear" the bullets as they pass through and it plots the group on the laptop screen so you don't even have to look through a spotter to see your group. This also allows you to calculate your own bc's on your bullets from your gun at your atmosphere.

    All in all, the 43 is too much overkill for most reloaders, but if you have the dough, it could be spent on worse things!
     
  10. LB

    LB Well-Known Member

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    Well, I don't shoot enough to justify the 43, barely enough for the 35P. But, it was a smart investment, I'm very happy with it.

    I sent my machine back once, turned out that I had borrowed a non alkaline 9V battery from someone at the range, made me feel a little stupid.

    The Oehler sometimes has problems with magnums not registering the proof channel. Shinny Nosler bullets fail to be picked up occasionally, depending on the sky condition.

    Not complaining, but the instrument is not 100% perfect. It's good enough, though. Worth the money. (get the four foot pipe)

    Good hunting. LB
     
  11. Ballistic64

    Ballistic64 Well-Known Member

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  12. ricka0

    ricka0 Well-Known Member

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    <font color="purple"> Far more important than absolute vel are the delta's ( SD &amp; ES ) The absolute value accuracy is irrelevant until you've established the delta accuracy. You can even argue absolute velocity is totally irrelevant to load development </font>
    [ QUOTE ]
    disapointed in the Oehler but have something you can rely on for life.

    [/ QUOTE ]
    The serial port Oehler's rely on is the equivalent of a muzzleloader - several generations out of date.
    Many laptops don't have a serial port, It won't be long before No laptops come with a serial port. The dynasouric serial port becomes far more of a problem when you try to use a USB to serial connection.

    The Oehler software is Win9x garbage, also several dogie decades old.

    RSI uses current technology - a USB port.

    [ QUOTE ]
    Chrony (the good one with the remote read)

    [/ QUOTE ]
    The cheap and top of line Chrony use the same trivial timing circuitry. You pay more for remote reads, etc. Timing a bullet is baby SH*T technology wise - getting a good reading probably isn't.

    If your Chrony doesn't read right when you've set it up correctly - send it back (if you can determine it's not reading correctly)

    I'm not disputing what you guys have written - it's probably much easier to get an accurate reading with an Oehler - but if you can control the light there is no reason a Chrony can't give accurate measurements.

    According to RSI:
    [ QUOTE ]
    <font color="red">All calibers measured by the Millennium were within 0.2% (99.8%) of lab recordings ...The venerated Oehler tested 0.3% behind the Millennium </font>


    [/ QUOTE ]
    CED Millennium Chronograph

    Note the Mil Chron uses the dynasouric serial port.
     
  13. goodgrouper

    goodgrouper Well-Known Member

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    One draw back I see to the Millenium is that it doesn't allow you to set it up on a longer rod. And I believe when they tested the Millenium and compared it to the Oehler, they were both on a 2' rod. The Oehler was slightly less accurate with this spacing, but I would be willing to bet that when the Oehler is set up on a 4' rod or even an 8' rod, that it is the same or more accurate than the Millenium on the 2'. Oehler states that the accuracy climbs a certain percentage on their unit the farther the skyscreens are from one another.
     
  14. LB

    LB Well-Known Member

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    Thanks for the report on the RSI, which I had never heard of.

    Some of these things, 2% or 3% accuracy, even USB ports, don't mean a thing to me. I like the fact that the 35P is simple, and I get a paper tape on which to make notes, etc. My application is only a point of reference, hobby stuff. For what I need, I am quite sure the Oehler is adequate. Shooting in the "dark" is something I can do without, for the time being. However, the price looks good, in comparison; no question.

    Good hunting. LB