Magneto Speed magnetic chronograph

Discussion in 'Gear Talk: What to Buy? and Gear Evaluations' started by Heavies, Jun 24, 2012.

  1. Heavies

    Heavies Site $$ Contributor

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    A good chronograph, IMO, is an essential part of any precision reloaders arsenal. My old Shooting Chrony was not getting the job done to my satisfaction, so I needed something better. I found out about this device from postings on this site, accurateshooter.com.


    Magneto Speed magnetic chronograph


    [​IMG]

    [​IMG]



    First impressions


    The construction of the display unit seemed a bit on the flimsy side, but, with care, I believe the unit will last.
    The sensor unit seems fairly sturdy, however like other reviews out there, the units clip latch seems like it might wear out.

    [​IMG]



    The first shots

    I read the instructions carefully and mounted the unit per. I then proceeded to fire the first round. To my chagrin, no reading. I looked over the unit and connections, loaded another round, and again, no reading.
    Now I’m starting to worry, took a step back and paused. I then un plugged the cable and reinserted. Loaded the third shot, bang, a reading. Lesson, be sure the cable is fully inserted, because the unit will turn on with the plug not seated completely, but no reading will result.

    I then proceeded to fire a three, then a five round group. The shots landed about 3 MOA high, which was of no surprise and expected from reading of other reviews on the web. A quick scope adjustment easily had rounds landing where I wanted them. All of these shot registered velocity and calculated average, extreme spread, and standard deviation. Storing the data to the included memory card worked and data was easily recalled using the toggle button and switch.

    The unit also came with a card adapter. This adapter is used to down load info to a PC, however, plugging the card into the PC I have cause some software errors. I have a printer with a card reader and I was able to extract the data that way. Not sure what that issue is about, but I am happy that I was able to retrieve the data. Maybe some computer gurus out there can recommend a course of action in this regard.

    Accuracy with the Bayo unit attached


    For the first shots, the accuracy of the rounds fired was within the typical patterning of this rifle. Group size seems to be in line with the typical accuracy of this rifle. The only change noticed thus far is the point of impact shifting about 3” high at 100 yards with the device clamped at the 6 o’clock position on the end of the barrel.

    There has been debate on the value of this chronograph, on this and other forums, due to the fact that the unit must be clamped to the barrel. This argument probably has merit, it is known that devices, such as barrel tuners, use extra mass to ‘tune‘ loads and accuracy in rifles. However, from what I have gathered so far, the un changed loads I have shot has not deviated from the 100 yard accuracy I have typically seen from my shooting ability and rifle.

    Further testing will be done to satisfy my curiosity and determine the practical uses of the device. So far I am happy with the products performance. I will update results and data as time and shooting permits.

    [​IMG]
    These are the best groups I have shot so far with and without the Bayo unit attached. More data needs to be collected to come to any sort of conclusion.


    Data from unit...

    185 Berger BTLR
    Series, 1, Shots:, 4
    Min,2797, Max,2834
    Avg,2815 ,S-D, 16
    ES , 37

    Series,Shot,Speed
    1, 1, 2797, ft/sec
    1, 2, 2807, ft/sec
    1, 3, 2834, ft/sec
    1, 4, 2824, ft/sec
    ----,----,----,----

    168 Berger Hybrids
    Series, 2, Shots:, 3
    Min,2868, Max,2888
    Avg,2877 ,S-D, 10
    ES , 20

    Series,Shot,Speed
    2, 1, 2875, ft/sec
    2, 2, 2888, ft/sec
    2, 3, 2868, ft/sec
    ----,----,----,----

    168 Berger hybrids 44 grains XBR 100 in/lb crimp
    Series, 3, Shots:, 5
    Min,2862, Max,2870
    Avg,2867 ,S-D, 3
    ES , 8

    Series,Shot,Speed
    3, 1, 2862, ft/sec
    3, 2, 2870, ft/sec
    3, 3, 2868, ft/sec
    3, 4, 2870, ft/sec
    3, 5, 2868, ft/sec
    ----,----,----,----


    155 SMK palmas 44.9 XBR LR primer Palma brass

    Series, 4, Shots:,10
    Min,2970, Max,2988
    Avg,2976 ,S-D, 7
    ES , 18

    Series,Shot,Speed
    4, 1, 2983, ft/sec
    4, 2, 2977, ft/sec
    4, 3, 2981, ft/sec
    4, 4, 2988, ft/sec
    4, 5, 2970, ft/sec
    4, 6, 2970, ft/sec
    4, 7, 2970, ft/sec
    4, 8, 2970, ft/sec
    4, 9, 2985, ft/sec
    4,10, 2972, ft/sec
    ----,----,----,----


    Data from the unit is pretty much perfectly in line from my drop numbers calculated from my confirmed 600 yard zero on these loads. This is outstanding! No more guessing on unreliable Shooting Chrony readings!

    So far I am liking the unit just because the readings are so consistent and seem to be very reliable. More testing to come...
     
  2. mikecr

    mikecr

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    Good review. Thanks for the efforts in providing it.
    How does it handle muzzle blast?
    Does it move around any?
    Mar the barrel finish?
    What is the claimed accuracy?
    Limitations, qualifiers, or caveats?

    I'm an Oehler user, and probably as skeptical as anyone about this new toy.
    I've re-graphed my ladders in the past, adjusting to MV per shot. But charge info has ultimately panned out as more useful.
    Now the only thing I use my chrono for is just what you're doing. Getting external ballistic information.
    I could combine this -with an Oehler downrange..
    And I can't help but love toys!

    Yep, I'm amped :)
     
  3. Heavies

    Heavies Site $$ Contributor

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    The only thing I can see so far is slight powder burns in the blast beam(area that is cut out where the end of the barrel overhangs).

    So far I have seen no movement on the muzzle as long as the straps are secure. The clamp has a soft rubber or silicone like material that keep slippage to a minimum. On a note, the barrel I am running has a centering ring for a Centra Goliath front aperture sight, so after a round or two the device wil set itself into the ring and not move at all. I am not sure how the device will react to barrel that is tapered with no front sight.

    Even with the straps tight the device left no marks on the stainless Bartlein barrel that it was clamped to. The rubber/silicone pad most likely will not mar any stainless type finish. Blued finish, not sure, nylon straps may rub, but I do not plan on testing this aspect.

    The manufacturer accuracy claims. http://www.magnetospeed.com/pages/reviews-tests

    Limitations are that the chrono can only be used on certain types and diameters of barrel. So this may not be the end all solution to someones needs. I only really read velocity from my rifle loads, so this device fit my purpose smartly.
     
  4. GSPV

    GSPV Site $$ Contributor

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    My lovely wife of 23 years gave me one for Fathers Day. I used it for the first time Sat. I used it on a polished HV barrel and a HV with a Shadetree tuner installed. Worked like a charm. Stupid easy to use.

    It stowed easily in my Stanely rolling shooting box. I may never leave for the range without it ever again.

    Greg J
     
  5. Rustystud

    Rustystud Site $$ Sponsor

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    I ordered one yesterday, I have a Oehler 35P also ordered. Will compair it to my CED, and Chrony. I need a chronograph I can trust and that has been a problem. Hopefully it will be resolved and there will be some used chronographs for sale in the next three weeks.
    Nat Lambeth
     
  6. hogpatrol

    hogpatrol Site $$ Contributor

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    I have one and like the way it sets up, takes down and records data. The whole unit fits in a small box, so far I am using the one as shown on a previous post. POI changes slightly but groups are basically unchanged. I like the way I can't turn it in to a pile of scrap like my last one, a chrony. :(
     
  7. hogpatrol

    hogpatrol Site $$ Contributor

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    " Limitations are that the chrono can only be used on certain types and diameters of barrel. So this may not be the end all solution to someones needs. I only really read velocity from my rifle loads, so this device fit my purpose smartly. "

    Mine came with an additional barrel clamp to be used with skinny barrels. My Model 7 in 17fireball's muzzle is 1/2 inch in diameter and tapered & no issues with blast or bore being too close or to the unit. Works perfect.
     
  8. Heavies

    Heavies Site $$ Contributor

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    Interested in seeing the results of concurrent velocity testing. I hope to finish up the group test this weekend, next I was going to work up a load with the unit attached and see how the load reacts when the device is not on the barrel.

    I am no benchrest shooter and not the best shooter, but I hope that these reviews and testing is useful for those looking for alternative chronograph options.
     
  9. ReedG

    ReedG Site $$ Contributor

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    In comparison tests, the MagnetoSpeed should always be slightly faster due to the proximity to the muzzle.
     
  10. mikecr

    mikecr

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    You can derive MV, so that your comparison is better:
    http://www.longrangehunting.com/forums/f19/true-muzzle-velocity-61081/
     
  11. hogdogger

    hogdogger Site $$ Contributor

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    Used mine for a bit and I love the ease of use especially at the range did I say it was easy to use :) I used it on varying barrel sizes and all went well.

    The biggest limitation on this is the plastic clamp that tightens the strap. There has been numerous claims that these have broken so I have been very careful with mine. I am going to try testing a way to eliminate or beef up this up a bit and hopefully it works out. Mine did move a small bit on the bigger calibers but it didnt affect readings or accuracy at all.

    Like other reviews I read it did affect POI but DID NOT affect accuracy as far as I could tell. All the rifles held thier accuracy with the bayonet strapped to the end of the barrel. But POI shifted roughly an inch from zero.

    The readings I get are spot on with my Oehler 35P from the data I had from the rifles I tested.

    Hope this helped

    Aloha!
     
  12. DukeDuke

    DukeDuke

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    Did anybody try it with a semi-auto pistol?
     
  13. hogpatrol

    hogpatrol Site $$ Contributor

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    On their website, they do not show it being used on any semi handgun, only revolvers/fixed barrels. It would probably be easy enough to rig up something to attach to a front rest for testing.
     
  14. Jaxdilation

    Jaxdilation Site $$ Contributor

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    I had to buy my wife a tv for fathers day. But I got a magneto speed too!
    It fits right in my drag bag. I won't go shooting without it.

    How many times have we all wished we had a chrony along, but it wasn't practical?

     
  15. Heavies

    Heavies Site $$ Contributor

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    Ok, I finished up my test, of sorts, to see if the bayonet effected groups size. The procedure I used:

    Loaded all rounds on the same day to get a consistent sample of the ammunition. All brass was freshly annealed, shoulder bumped .0005", neck sized with the Lee Collet Neck sizer, 'rested' for 3 days, primer pockets cleaned with the Sinclair LR primer pocket uniformer, primed with PMC Russian primers, and bullets (155 grn SMK Palmas) seated to .040" off of the lands. The charge was 44.9 grains of IMR 8208 XBR dispensed by the RCBS Chargemaster. All charges loaded were thrown by the Chargematster unit exactly, any low or high charge was dumped back into the hopper.

    Wind conditions were bad, Very windy. This, in addition to my poor shooting ability, OK mostly due to my poor shooting ability, accounted for some poor groups. However, the amount of samplings, IMO, can give a good idea of how the Magneto unit performed.

    All shots were from the prone position from a Mwerks bipod and a Protecktor rear bag. Wind flags were utilized, somewhat, at the firing line, 50 yards, and at the target, 100yards.

    I shot 10, three round, groups with no unit; I then shot 10, three round, groups with the unit attached to the barrel.

    Here is the worst group with no unit.
    [​IMG]


    Here is the worst group with the unit attached...

    [​IMG]



    The best groups are posted in the original post.



    Here is the data that I collected...
    [​IMG]



    The Average with the unit attached to the barrel was .4126", and the average group size with nothing on the barrel measured .4479". With such a small difference in the group averages, I believe that the Magneto speed bayonet, attached to the barrel, has a minimal effect on group size accuracy. With that being said, the unit DOES effect the point of impact on the target. This shift in POI, for my current 100yard zero, was not necessarily predicable. With the unit off and on a few times, I noted that once the shots flew 3MOA high, another time the unit shot 1MOA high and to the right .5MOA, and lastly the POI was right on the 100 yard zero, no shift at all. This, I postulate, is because the unit cannot be attactched in the same place and in the same position all the time, therefore, the POI shifts cannot be accurately predicted.

    I believe that this can be worked around with foulers and sighters that are necessary during load development anyway.

    The chronograph performed flawlessly during the entire session. No shots went unrecorded, and all data was inline with known data that I have collected for this load. I believe that this new product can be very useful for the precision reloader. On a side note, the conditions I shot in today would have rendered my conventional Shooting Chrony useless!

    I hope that this review is useful to all, and Any critiques or comments are welcome. :)
     
  16. effendude

    effendude Site $$ Contributor

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    Just what I need, another "Must Have" piece of gear to upgrade what already works fairly well (CED). Great information on the tests. I think the biggest benefit from my point of view will be easy set up. Getting a chrony positioned properly at a busy range takes a while.

    Scott
     
  17. hogpatrol

    hogpatrol Site $$ Contributor

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    First time I used the Magnetospeed on an Annie 17hmr pistol & it would not register. Changed the bullet type to shotgun/slug & it worked flawlessly. Found that the 12 inch barrel versus a 24 inch barrel, the mv loss was less than 150fps. POI moved 1/2 to the left @ 100 yds. with the unit on the barrel. Elevation remained the same. Setup is so easy, switching between different guns is a non event. I checked some loads on a 6BR, an AR and the pistol in a few hours.
     
  18. LRPV

    LRPV Jason Walker Site $$ Contributor

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    Have you had a chance to test things yet Nat?
     
  19. LRPV

    LRPV Jason Walker Site $$ Contributor

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    Thank you Heavies for your reviews. Since Nat has not gotten back to us with his testing against the 35P and lesser chronos, I will ask if anyone has had any negative experiences with the magneto unit?
    Jason
     
  20. Heavies

    Heavies Site $$ Contributor

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    You are very welcome. I just hope that the info was useful. I have not got to test working up a accuracy loads with the unit attached as of yet. I have been busy playing with my recently acquired Garand. ;)

    The only problems I have encountered thus far are,

    Unit failed to read because I didn't have the plug inserted into the display completely, easy fix and my fault completely.

    The unit failed to read when attached to a 1" diameter 6mmbr barrel, fix was I had to play with the sensitivity a bit, after that no problems, velocity was right in line on the known load that we where shooting.

    The point of impact with the unit attached was not predictable with the known loads zeros. Not a big deal IMHO

    So far so good. :) it also worked great on the garand, I just attached it at the 10 o'clock position in back of the front sight. The device clocked every shot. :)
     

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