Magneto speed V's Shooting Chrony at 10'

[Ecomeat]

When talking about "nodes", undoubtedly 99.9% of folks who comment are talking about conventional chrony measurements taken 10' from the muzzle.

How many of you Magneto Speed users have compared your Magneto Speed results at "point blank" muzzle range, to a conventional chrony set up 10' from the barrel ?? Hopefully some might share results to save a few wasted rounds .

130 Bergers in a 6.5 x 47 Lapua for 5 shots, averaged 49.6 fps....call it 50 fps faster .....on the Magneto Speed than the Shooting Chrony Beta Master recorded at 10'.

168 Bergers in .284 Win for 10 shots averaged 100 fps faster on the Magneto Speed than the Shooting Chrony Beta Master recorded at 10'

Has anyone tried the comparison on the Berger 7mm 180 gr yet ?
Any 6mm x 105gr comparisons available ?

Thanks and regards
Ecomeat
Queensland
Australia

.

 

[Nomad47]

Comparing a Shooting Chrony at 10 feet to a MagnetoSpeed at the muzzle is like comparing apples to oranges since you can't set the Mag at 10 feet nor the Chrony at the muzzle.

I went to the JBM website and entered 3238 as a velocity measured at 10 feet and the program told me muzzle velocity was 3243.6 fps.

Also for you to lose 100 fps in 10 feet, those 168 bullets must be throwing out drag chutes.

 

[Ecomeat]

I am a cow cocky, not a rocket scientist, so i was just accepting the results on face value.
I was quite shocked, coz i was expecting maybe 5 fps or so difference in the two readings. I was very surprised for a 130 gr 6.5mm bullet at 2965 fps avg (Magneto Speed velocity) to be exactly half (50 fps compared to 100 fps with the 284) of the "difference" of the 284 measurement (avg 2915 fps on the MS reading) but figured it had to be something to do with the magnetic pulse that the MS uses to record a velocity reading. The 168 grainer being nearly 30% bigger/heavier would obviously have some effect on the pulse, but I sure wasnt expecting anything like these results.

Hopefully some others will chime in that have actually used both at the same time, like i did.

I have to say that I have never really trusted the conventional chrony, and in this instance actually borrowed a mate's Beta Master coz my own was playing up and refusing to read at all.
Ecomeat

 

[Nomad47]

I have no idea what a cow cocky is but it sounds something like our cowboys.

I set both units out a few days ago like you did. Velocity difference was more than the 5 or 6 fps that it should have been and I don't remember exactly what it was. I have the results written down somewhere. I was surprised to see that both units said I had a SD of 9. But to be honest, I think that was more of a coincidence. I know I can get different readings on my Chrony just be varying how far above the sensors the bullets pass.

Edit: BTW, my comparison was done with a 6XC and 105 AMax bullets.

 

[DennisH]

I have no idea what a cow cocky is but it sounds something like our cowboys.

I don't either, but it's an Australian thing!

 

[Ecomeat]

Sorry boys......i should have said "cattleman". I run a cattle stud where we farm South African "Bonsmara" cattle.
what I meant was simply that I am a cattleman who works with cows, calves and bulls all day, every day, with a little bit of farming (tractors and ploughs) thrown in...............and F Class from 300 yards to 700 yards almost every Sunday.........so I sure am not trained as a scientist or a ballistician !!
I am a simple farm boy.....or at least i was about 50 years ago before I became a wrinkly old cattleman.
Ecomeat

 

[fdshuster]

Ecomeat: The Shooting Chrony 1 that I had was so completely unreliable, that trying to do comparisons with the Magnetospeed was a useless waste of time, ammo & barrel life.

Like comparing a Yugo (remember those?) to a Mercedes.

 

[LongRanger]

Snipers Hide web site has many pages of comments and test results concerning the MagnetoSpeed, including in-line test results of the same bullet across the MS and optical chronos like the Oehler 35 and CED. Differences are mainly in the single digits.

I've owned 2 CED's, both of which clapped out after many hundreds of rounds, due to what I've read is caused by "shell shock" to the sensors.

Also owned a Chrony Beta. Nuff said.

Have fired about 300 rounds over my MS the past 6 weeks. WOW, what a pleasant difference.

Frank B.

 

[FroggyOne2]

I know Frank and knowing how closely he is about his loading and shooting, enough that if he says that is impressed with the Magnetospeed over other systems that he has used in the past is enough to tell me that when I decide to get another chrony, I am going to go with his thoughts and reconmendations. So it looks like that sometime in the future there will be a MagnetoSpeed in my bag.

 

[tonedaddy]

My Magnetospeed showed around 30 fps more than my chrony at 15ft. Then again the crappy chrony would only register around 6 shots out of 10 and some were 100 fps low or high! Magnetospeed is the best IMHO!

 

[flatlander]

Sometimes I really have to wonder about how far off my two CEDs (M1 & M2) & Oehler M33 chronos must be - I always seem to get considerably less velocity than so many others who post their results on the web. I must consistently get 'slow' barrels from Bartlein & Krieger....but then, when I start to see even slight ejector swipes on Lapua caseheads, I back the load off a bit.

One thing I have done to compare these three chronos is fire good quality 22RF match ammo over all three sets of skyscreens (individually, not all three in line with each other). Most of the Eley, SK, & Wolf match ammo runs right around 1080fps - at least, all three chronos agreed on this. That being said, when checking high velocity CF rounds, the older M1 is consistently a little faster than the M2, and the M33 - well, it's been so long since I was motivated enough to buy 6 fresh D-cells to check it, I don't recall whether it was faster, slower, or in between the other two on hi-vel stuff. IIRC, the newer magneto-speed chronos have a setting for lead bullets, so a shooter should be able to get an apples-to-apples comparison between the two types of chronos using 22RF ammo. One thing to keep in mind - if a chrono has a consistent error factor at velocities in the 1070-1100fps range, that factor will likely be larger at higher velocities.

 

[M14AMU]

I am a cow cocky, not a rocket scientist, so i was just accepting the results on face value.
I was quite shocked, coz i was expecting maybe 5 fps or so difference in the two readings. I was very surprised for a 130 gr 6.5mm bullet at 2965 fps avg (Magneto Speed velocity) to be exactly half (50 fps compared to 100 fps with the 284) of the "difference" of the 284 measurement (avg 2915 fps on the MS reading) but figured it had to be something to do with the magnetic pulse that the MS uses to record a velocity reading. The 168 grainer being nearly 30% bigger/heavier would obviously have some effect on the pulse, but I sure wasnt expecting anything like these results.

Hopefully some others will chime in that have actually used both at the same time, like i did.

I have to say that I have never really trusted the conventional chrony, and in this instance actually borrowed a mate's Beta Master coz my own was playing up and refusing to read at all.
Ecomeat

"I have to say that I have never really trusted the conventional chrony"

The ONLY THING I trust.....is what appears on the face of the target at whatever distance being shot!!

 

[Ecomeat]

The ONLY THING I trust.....is what appears on the face of the target at whatever distance being shot!!

I think you might be spot on, RMulhern. I had better pay a lot less attention to any data from a conventional Chrony in future.
I will definitely try Flatlanders suggestion re using 22rf Match ammo as a bit of a "baseline" though and do another comparison using both chronys at the same time.
It's very encouraging that it appears that every Magneto Speed user trusts their unit completely and is full of praise
Ecomeat

 

[normmatzen]

Well, I must say that my Shooting Chroney works a lot better now that I have actually read the instructions (I know, strange concept!) and carefully set it so I shoot in the sweet spot and only use the sky screens recommended!

But, that is in the past now that I have a new shiny MagnetoSpeed!

The difference between readings with the Chroney at 12 ft and the Magnetospeed at the muzzle has been almost exactly what ballistics tables calculate. That impresses me about both the MagnetoSpeed AND my Chroney! And that is based on my 7X57 hunting rifle and my 6BRX long range BR gun.

 

[DennisH]

Is the V2 worth waiting on since it's on backorder?

My biggest barrels are 1" at the muzzle. I have an AR with a muzzle break.

Just wondering if the additional items in the V2 kit are worth waiting for. I am sure it is if you have a use for it. But I just wanted to see everyone's thoughts. The V2 will handle anything 2" in diameter at the muzzle and has polymer spacers.

I will be getting rid of a Chrony to acquire one of the below, Dennis

V1 1 kit is below: Looks perfect for an avg F Class shooter.

V2 kit is below:

 

[Ecomeat]

Well, I must say that my Shooting Chroney works a lot better now that I have actually read the instructions (I know, strange concept!) and carefully set it so I shoot in the sweet spot and only use the sky screens recommended!

But, that is in the past now that I have a new shiny MagnetoSpeed!

The difference between readings with the Chroney at 12 ft and the Magnetospeed at the muzzle has been almost exactly what ballistics tables calculate. That impresses me about both the MagnetoSpeed AND my Chroney! And that is based on my 7X57 hunting rifle and my 6BRX long range BR gun.

So what are the fps readings with your 7 x 57 and your 6 BRX using the magnetospeed, and using your chroney ??
Approximately how high over the chroney sensors is your projectile passing ?
Rgds
Ecomeat

 

[Killshot]

Is the V2 worth waiting on since it's on backorder?

My biggest barrels are 1" at the muzzle. I have an AR with a muzzle break.

Just wondering if the additional items in the V2 kit are worth waiting for. I am sure it is if you have a use for it. But I just wanted to see everyone's thoughts. The V2 will handle anything 2" in diameter at the muzzle and has polymer spacers.

Dennis, I've tried my buddy's Magnetospeed on my 1.250" barrel and it's a no-go.


I'd get the V2

 

[Nomad47]

I tested the V1 on a one inch barrel with a Harrell's brake. First shot - no reading. I then adjusted the sensitivity to 6 - all shots registered after the adjustment.

 

[Ecomeat]

Dennis, I've tried my buddy's Magnetospeed on my 1.250" barrel and it's a no-go.
I'd get the V2
[/quote]


I tried altering the settings including the sensitivity, and couldnt get my Magneto speed to read on a 1.1" barrel, so I removed the rubber spacer alltogether and tightened the clamp up.......works perfectly, and hasnt failed once. someone else was using a strip of electrical tape between the barrel and the Magnetospeed, but mine is working perfectly with just the plastic "V" shaped frame held firm against the barrel .
Ecomeat

 

[DennisH]

Thanks for the above replies.

It seems everyone is getting the biggest barrel they can get these days, so I will wait for the V2.

Even with some of mine @ 1", and Dec being around the corner, it will be worth it.

Thanks, Dennis