Home Forums Hunting & Shooting Ask The Gunwriters MagnetoSpeed Chronograph?

Anyone using a MagnetoSpeed chronograph? How do you like it?

http://www.magnetospeed.com/

I just got one from Midway via UPS yesterday. I hope to have some time with it at the range Friday.

The company is supposed to be sending one for me to test, but I haven't seen it yet.

A few threads that discuss the magnetospeed. I've been using one for awhile with no complaints...convenient immediately comes to mind. There have been discussions relating to grouping and POI change with respect to the influence on barrel harmonics and a ground effect as the projectile passes over the deck of the bayonet that contains to the two coils. Absolutely no dropped shots during my use (I've only run monoliths and lead/copper bullets over the deck) as of yet and the data is easy to pull off and import into a spreadsheet.

The company who designed the unit brought the system down to our ballistic group from Austin during the development and the data gathered agreed right along with the Oehler unit.

I look at it as another tool and option...for some it will fit the bill and for some it's not quite what they're looking for.

Hopefully they'll get one to MD quick as his review/feedback would be interesting.

https://www.24hourcampfire.com/ubbth...e/COOL_COOL_COOL_Chronograph#Post7596941

https://www.24hourcampfire.com/ubbth...eed/Search/true/MagnetoSpeed#Post7940954

https://www.24hourcampfire.com/ubbth...h/true/Re_chronograph_advice#Post7951313

Yeah, with that gizmo strapped to the barrel, I imagine the shots would only be useful for speed measurement. Maybe they could be used as the first two or three shots just getting on paper, but I would not regard the POI or group size, unless one plans to leave the thing strapped on when hunting/shooting - NOT!

I had used version 1 for about a year and currently own version 2. There is a POI change but it is not really that important to me. I usually work up my loads for accuracy. Then and only then do I take that specific load out to chronograph.
Speed and accuracy are two different animals to me, why people try to do them together is beyond me, unless it is for convenience or rationing of components.

Love mine, speed and accuracy measured at different times. Only problem is everyone is curious, and I want to mind my own business.

I couldn't handle the poi change. It also wouldn't stay on the barrel of unbraked heavy hitters like my 340 and 416. It would stay on a 338 Lapua that was a 12lb gun with a brake. I couldn't attach it to my 10mm Glock either (should be easy to fix with a rail mount for pistols so equipped).

I do develop loads for accuracy and ES is important for me as I shoot long sometimes. If I spend hours and hours to develop a load that shoots bugholes at 100 or 200 but then later find my ES is 47fps.....I've wasted time and components and barrel.

For some, it's great. It's easy to set up and it never missed a shot. It also of course gives you muzzle velocity, not vel @ 15' or whatever. Its numbers corresponded very closely w a 35P.

The Superchrono is another interesting choice that has proven to generate accurate numbers with easy set up as well. It won't measure subsonic though. The upcoming Superchrono Pro and Acoustic target promise to be interesting too.

Convenience is a big factor for me, and safe load work-up comes into play as well when doing both together. We all have different situations. I'm not lucky enough to be able to shoot in my back yard. I haul my stuff out of the basement, load it in my vehicle, then have a one hour round trip to the range that takes two gallons of gas. I like to maximize what I can do with each trip.

I like to know the speed, but I especially use that as my best proxy for pressure as I develop loads. It's way more efficient for me to evaluate accuracy at the same time.

I think this new chronograph is a neat tool. As I've posted elsewhere, I can almost justify buying one. But my Oehler works well in my situation, so I'll use my funds for other toys. Obviously, not everyone is I the same boat.

I am always astounded by the number of handloaders who think knowing the velocity of their loads is a minor afterthought in the process--just as I'm amazed by shooters who think a bore-sighter is useless, when they're almost essential for mounting scopes properly, and can save a bunch of time and ammo in other ways.

Of course, we can get along fine without either a chronograph of bore-sighter, and older shooters (like me) did for many years. And in reality we could all still get along fine with factory ammo, and scopes mounted by the local store. But that's not what most Campfire members are all about.

In fact I wonder why some people post on the Campfire, when their total reason for posting appears to be old-fashioned harrumphs about all the time and energy wasted on irrelevancies--when those very people ARE SPENDING TIME AND ENERGY POSTING ON THE INTERNET. If they're so convinced their simpler way of doing things is best of all, why in hell do they own a computer?

John, it's so that they can share their "harrumphs" with a wider audience.

Of course! And they might even induce a chorus of harrumphs....

It goes like this...

$600.00 rifle? Check!

$500.00 scope? Check!

$600.00 in reloading equipment? Check!

$1,000.00 in components? Check!!

$350.00 in front rest and rear bag? Checker'ooo!

$89.00 Chrony? Why the pfjuck would I need that????



Travis

harrumph...harrumph...harrumph...harrumph...

harrumph...harrumpfffzzzzz...haruzzzzz...hzzzzz...zzzz...zzzz

Yep. In fact I have a friend who owned at least half a dozen custom rifles costing several thousand bucks apiece before he finally broke down and bought a $100 chronograph.

The reason?
One day I was at the range with him and he asked to run some handloads from his .270 Weatherby over my chronograph. He'd used data from the Hornady manual, and the first load with the 130-grain Interlock was very close to Hornady's listed velocity, around 3400 fps. The second, however, was the same powder charge with 130-grain Partitions, and it got about 3600 fps.

He wondered why that happened. I explained about different bullets creating different pressures. The light started to go on, and he said, "You think that's why the primer pockets get loose after 2-3 shots with the Partition ammo?" O nodded, and then did a little figuring and told him if he reduced the charge of H4831 by three grains in the Partition load the velocity would also be about 3400, and his expensive brass would last longer.

He bought a chronograph that week.

The possibility that it may affect the rifles grouping would be the big drawback for me.

I like to work up a pressure series and check groups simultaneously. You might see indications of a really accurate load at 100 fps below what the chambering should be capable of. Or you might not reach it until you hit your max. Once you see where the accuracy is with safe loads you can focus on that charge weight to play with seating depth or whatever else your heart feels like tweaking.

With something that could be misrepresenting where the accuracy really lies you could waste your time and ever more expensive bullets and powder going down a false path.


Now if it is proven not to affect the barrel's native accuracy that would be great, but having something hanging off of the barrel like that - I'd have to hear a lot of evidence from different people that it had no effect on accuracy before believing it.

What kind of POI changes are we talking about with the MagnetoSpeed? I've been intrigued by the idea, but I do shoot for groups and get velocity at the same time.

The POI I have seen with mine is usually 1 to 2" low but they still group together.

Brain fart, epiphany, etc.

He probably never read your stuff, where you discuss NPT's having a bit more friction...

He was probably cranking out some pretty impressive pressure peaks at 3,600 fps...

DF

Thanks. That would make it hard for me to put much stock in the groups. Just knowing something is different.