OzFclass

I got my MagnetoSpeed chrono delivered last week and ran a series of test loads thru for my F T/R developement work. I have a CED M2 with IR screens and have used it reliably for a few years now. I dont think I will be using the CED M2 anymore after using the MagnetoSpeed.

All I can say is that this device is the best and easiest to use chronograph I have ever used. It incorporates new technology for bullet sensing in the form of electromagnetic sensors which are uneffected by all the usual problems associated with optical sensors found in most chronos. It has gone thru the testing and developement stages and is now a mature product. Its accuracy has been checked by a number of establishments and has also been verified using high speed video just like in Mythbusters.

Its comes in a very small package that could fit under the foam with a rifle in a Pelican long rifle case. The interface on the small hand held monitor/controller is simplicity itself to use and logs to a 1 gig micro SD card which comes included along with the 4 AAA batteries that are required. The micro SD card can be inserted into a card reader on your pc and all your load data is available to Excel already formated as you would require. They should be available in month or so for international customers.

Look here for info on this new chrono http://www.magnetospeed.com/

There are a couple of points you need to be aware of when using this device and one is that at the moment the mounting bracket only accomodates upto 1" diam barrels. If you want one suitable for 1.25" barrels it can be made in their custom shop or you could wait until the production unit is avalable for the big barrel.

The other point is that having a barrel mounted sensor the point of aim will be slighly off (generally high by 1 moa) from using a bare barrel, the sensor and barrel clamp is very light and does not seem to effect group size. If you use a chrono at the same time as checking groups etc then be aware that when finished you need to check POA without the sensor on the barrel to establish elevation for a drop chart.

The best thing about this chrono apart from its easy to use interface and setup is that you can now test velocity on your home club range in the middle of a club comp if needed. There is now no longer a need to setup a tripod and sight screens downrange from the muzzle of the rifle. Set it up on your rifle and take your position on the mound and test away without disturbing the other shooters, brilliant!

Ian

Ian pm sent

Sounds Great ! cant wait to see you use it during a shoot ( maybe this Saturday ) ; )

cheers dave

I have had quite a few PMs about the MagnetoSpeed so I thought I would let you know as much as I do about their availability.

MagnetoSpeed have only just been granted permission to export these units internationally as they have been classified by the USA government as NOT IATR.

It will be approx 1 month before they will be shipped for export so not too long to wait for such a damn good product. I recommend emailing MagnetoSpeed and placing an order, as full production is also a month or so away and demand exceeds supply at the moment. At $US250.00 these chronographs represent value for money.

Hope this helps answer a few questions for those interested and for me it was money well spent, as I can now load test at my club range on Saturdays without upsetting anyone on the mound.

Ian

Did you type that correct?
Are they only US$250?

OuttaAmmo wrote:Did you type that correct?
Are they only US$250?

They are priced at $US250 that is correct and they are exceptional chronos using new technology that makes the units easier to manufacture and keeps the cost down. Its only the cost thats low as the quality is high!

Ian

Ian, I have been in touch with Alex, he is in the process of updating the website for international orders, should be right in a day or so.

Cheers
Danny

Their website is now taking orders for Aust.

If you want one you need to place an order and go on the waiting list.

Another new toy on its way, god bless the gun fairy

Our firing line now has a big shade sail on the front of the tin roof - it causes problems with the CED Mk2 in late afternoon sessions. I think I'll be getting one of these from my gun fairy !

I wonder what effect the unit will have on the mass & dimension of a barrel when tuning?

johnk wrote:I wonder what effect the unit will have on the mass & dimension of a barrel when tuning?

Snipershide lethal93ta

......it dont change the harmonics at all, it does move the POI 180 degrees from where it is on the rifle, if you put the MS on at the normal 6 position it will shoot high, if you put it at the 12 position it will shoot low same for left or right but it dont change group size's Ive put over 500 rounds over my magneto speed so far testing it and its been dead on.....

johnk wrote:I wonder what effect the unit will have on the mass & dimension of a barrel when tuning?

It would have to significantly effect the harmonics. That is my main doubt about the concept. If it isn't too heavy perhaps it could stay on the rifle. I think it could be classed as a tuning device for the purposes of the SSRs. Can someone tell us what the weight of the mounted part is?

Alan

I think as a speed measuring device it would be simple and great!

The change in harmonics of the barrel as a consequence of attaching a chunk of metal to the end of it would have some impact on group size, so I would take it off when tuning the load further. Also the lopsided interference on the exhaust gases would have some impact on accuracy too.

My process when developing a load to suit a new barrel has been as follows:
1. [Chrony] Get a load that runs at the speed I want to be at, by starting low and working up in powder loads.
2. Ensure that load is not too hot....by looking at the primer post firing.
3. [No Chrony required] Then load sets of 5 rounds around the load that got me to the speed I want, and see which gets me the tighter groups.

Done.

Alan, if you want to buy one, I'd be happy to use it from time to time

PS: Does it come in other colours? Yellow would be nice

AlanF wrote:

johnk wrote:I wonder what effect the unit will have on the mass & dimension of a barrel when tuning?

It would have to significantly effect the harmonics. That is my main doubt about the concept. If it isn't too heavy perhaps it could stay on the rifle. I think it could be classed as a tuning device for the purposes of the SSRs. Can someone tell us what the weight of the mounted part is?

Alan

Alan, read the first post about effect on POA. I just weighed it on my kitchen scales and the sensor bayonet plus strap, etc, came in a very HEAVY 4OZs. Its probably too heavy for you to use Alan, I recommend you stay with the CED M2. For everyone else who wants whats probably the best chrono currently available for velocity testing your load I recommend it as a 10 star buy!

If you can be bothered actually researching the subject matter then look here for stats on effects on group size, etc: http://www.snipershide.com/forum/ubbthr ... 447&page=6 and here: http://www.magnetospeed.com/

Ian

bartman007 wrote:I think as a speed measuring device it would be simple and great!

The change in harmonics of the barrel as a consequence of attaching a chunk of metal to the end of it would have some impact on group size, so I would take it off when tuning the load further. Also the lopsided interference on the exhaust gases would have some impact on accuracy too.

My process when developing a load to suit a new barrel has been as follows:
1. [Chrony] Get a load that runs at the speed I want to be at, by starting low and working up in powder loads.
2. Ensure that load is not too hot....by looking at the primer post firing.
3. [No Chrony required] Then load sets of 5 rounds around the load that got me to the speed I want, and see which gets me the tighter groups.

Done.

Bartman, I follow a similar process to what you suggest and once I have found a load at near max pressure that groups well I then move onto using a chronograph and fine tune the load.

The sensor bayonet is an abs plastic and very light (4ozs) and I found no real differnce in groups shot with and without it fitted. I did get a POA shift upwards by about 1 moa. Lots of shooters now have stats confirming what I found for myself when using it and it seems it can be used for load developement including the group size. I recommend taking it off to get correct elevation for use in plotting range charts. The elevation is generally thought to be attributed to muzzle blast effect on the sensor deck as when you rotate the sensor bayonet around the barrel the POA changes with it. One of the USA F T/R team rotated the sensor and a shot a group that formed a very neat triangle. Read the link I posted to snipershide as its full of info on the magnetospeed.

As far as shooting with it attached in a competition, I think I have been taken too literally. I meant by that statement you could do velocity testing during the running of your club competitions without interferring with the other shooters. So get your stage/relay shot and then attach the magnetospeed and check velocity, etc, without upsetting the running of the comp.

Ian