Garmin vs MagnetoSpeed parallel test

[Rory]

Is there much variation from say one Garmin or one magnetospede to the next. So if I use D’s one day, and then a few months later use F’s are the results comparable. Or should you just stick with the one unit?

Doe atmospheric’s also change things - cold high pressure air is a lot denser than hot low pressure?

I've had my Xero alongside another, both measuring one rifle simultaneously. They were in about the same position, either side of the rifle.
There was a 3-4fps difference between the two over 10 shots. One read consistently lower than the other, within 3-4fps.
So if mine read shot 1 as 2785fps, the other read it as 2782fps.
Forgot to take a picture, but I was happy that it was consistent and very close.

 

[Rory]

Would a Garmin be okay for club use were a lot of different people would have access to use it then hopefully return it to the clubhouse.
Is it just switch on and shoot any calibre past it?
Asking because our club is thinking of buying one for member use.
Thanks, Kb.

Yes, just follow the instructions and enter the bullet weights, which makes it easier to discern your own data.
Have each shooter enter their bullet weights and make sure that once they're done, they end their session and a new session is started by the next shooter.

 

[safer]

I have seen Garmin on an indoor range in both clubs I am in but never seen them being used next to eachother.

 

[kenbro]

Yes, just follow the instructions and enter the bullet weights, which makes it easier to discern your own data.
Have each shooter enter their bullet weights and make sure that once they're done, they end their session and a new session is started by the next shooter.

Being thick here, but why are bullet weights needed to calculate speed?
Thanks, Ken.

 

[Rory]

Being thick here, but why are bullet weights needed to calculate speed?
Thanks, Ken.

It's one of the parameters you can input into the Garmin Xero.
From 'power on', you can select 'new session', then what you will be using (rifle, pistol, bow, air rifle) and then you select a velocity range.
You can then select projectile weight.
You don't have to, but I'm guessing it will assist with the reading by providing a bullet weight that is then measured by the Doppler radar.

 

[safer]

Being thick here, but why are bullet weights needed to calculate speed?
Thanks, Ken.

Only Garmin asks for bullet weight because it does not measure the speed right at the muzzle. It calculates the speed based on distance it picks the bullet at.

 

[NullMac]

Well all the early adopters seem to have changed out their magneto speeds etc for Garmin and the shops have plenty stock kicking about looking for a new home after the initial frenzy has dried up.

Long term it will be the style of chrony to go with but the benefits as so minimal there is little point in changing out if you already own a modern chrony, certainly for stalking purposes or target plinking. The second hand magneto speeds are a good opportunity to buy a good chrony at a good price.

For our purposes we don't need super super accurate velocities so firing an extra 5 shots in the whole load development cycle isn't much of an issue.

Its a big ticket for something you can work out for free.

 

[kenbro]

Well all the early adopters seem to have changed out their magneto speeds etc for Garmin and the shops have plenty stock kicking about looking for a new home after the initial frenzy has dried up.

Long term it will be the style of chrony to go with but the benefits as so minimal there is little point in changing out if you already own a modern chrony, certainly for stalking purposes or target plinking. The second hand magneto speeds are a good opportunity to buy a good chrony at a good price.

For our purposes we don't need super super accurate velocities so firing an extra 5 shots in the whole load development cycle isn't much of an issue.

Its a big ticket for something you can work out for free.

Nice if your club buys one. .
Kb.