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MagnetoSpeed.com

I really like mine. I've used it from 22-250 up to 338LM with no issues. I have not had a chance to correlate with LR drops but velocities seem to be on. +1 with everyone else who says it is easy!
 

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I would be curious to know how that device strapped to the barrel affects point of impact VS point of aim or accuracy?

Any of you guys notice any problems?

Bob
 
On my factory Cooper 22-250 (pictured above) the POI did not change, and accuracy (at 100yds) was typical (.5 MOA)

I have a custom 338 LM with a broom handle thick barrel, and POI did change on this (at 200). POI moved upward about 2.5". Accuracy was also typical for this rifle.


I guess POI changes will vary from rifle to rifle, but accuracy seems to hold. I won't be using mine for ladder tests or for LR groups, but for confirming drops, keying in pn velocity, and testing a known load for ES it is awesome.
 
Md reloader said:
I really like mine. I read where some people have overtightened the strap and broke the bracket.I put mine on snug and check it carefully between shots.
Click to expand...
I'd suggest just a little bit of butyl tape between the mount and barrel to eliminate that problem. You can get it at any builder supply or even most hardware stores. It's the tape used to secure the overlapping edges of steel roofing sheets.
 
Works as advertised. Has never failed to read a shot under various conditions. I use it for determining max charge and clocking promising loads. I never use it during accuracy testing.

I've never thrown a golf club in a lake but a chronograph that habitually fails to read a shot has got to be the same feeling. At this point I think it's fair to say I'm done with traditional chronographs.
 
Nimrod said:
I would be curious to know how that device strapped to the barrel affects point of impact VS point of aim or accuracy?

Any of you guys notice any problems?

Bob
Click to expand...

I do get some POI changes and just don't trust any accuracy test with tool strapped to the end of the barrel. For me, the trade off of getting readings every time I expect them vs finicky tools that only sometimes get readings during accuracy testing is more than a fair trade off. Can't tell you how many times I've taken a trip out to the desert expressly for chrono data and been turned around due to finicky equipment. If I normally load 5 shots of each load, I might load 8 and when I done accuracy testing the first five, I'll strap on the magnetospeed and clock the last three of each load for a little data. I look forward to the last three because I can pick off ball targets like rocks or a broken clay pigeon I stuck on a branch and lob shots at them and still get good data because I'm not forced to shoot through sky screens. I can do more thorough testing on promising loads later.
 
Took my new magneto speed out today, It functioned flawlessly. I did have to play with it a little to have it fit properly with the sized barrel I was shooting. I found when I added all the spacers needed it tended to have some raising up at the end of the bayo. The point of impact was changed by about 1+ inch but it did not affect the group size. My main reason for buying this unit was to have constant speed reading and it has accomplished that.
 
you guys convinced me......I just ordered one from the LRH store , just have a question....
does it work with muzzle brakes ? some of my wildcat chambered rifles have brakes machined into the barrel ....
 
Swamplord said:
you guys convinced me......I just ordered one from the LRH store , just have a question....
does it work with muzzle brakes ? some of my wildcat chambered rifles have brakes machined into the barrel ....
Click to expand...

The instructions that came with mine say that 4" is the max allowable length of a muzzle brake. I have shot it on my 338LM with an APA FB brake with no issues.
 
I have a Sporter .... it uses a 9V battery.

In terms of Point-Of-Impact ... it DOES affect the POI ... still can get small groups .... but after testing your zero should be adjusted without the MagnetoSpeed attached.
 

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