Magnetospeed Slow Speeds… Thoughts & Ideas?

[xocyrusx]

I am getting some unusual slow speeds and thinking it’s 2 things.

I replaced the battery and got 30fps faster replacing the battery and i recently switched to an amazon 3.5mm cable as a replacement.

I checked back in my logs and it’s progressively dropped. It was at 1090 +\- back in April. I just saw it slowly drop and didn’t think anything of it.

Since it’s rimfire I was at 1033 to replacing the battery to 1063 and thinking I should be and was at around 1090.

I asked Magnetospeed and they said battery has nothing to do with it but could be placement.

Thoughts?

 

[Dave62677]

When my magneto not close enough to the bore , it does throw some slow number randomly.

 

[xocyrusx]

When my magneto not close enough to the bore , it does throw some slow number randomly.

Unfortunately it’s a great SD and it’s all of them. I use an MPA mount and it’s consistently in the same spot. I might have to re measure and see if anything slipped

 

[6.5SH]

Given is rimfire need to keep lot # and temperature differences in mind as well.

 

[xocyrusx]

Thank you and that’s what I was thinking. I checked the cases and it’s all the same lot and well I’m in Florida so it’s hot and fuckin hot.

Just to add I ran it out too 300 and it lines back up with the 1090 area.

I really think maybe it’s the cable…

 

[camocorvette]

Was the temperature of the ammo the same and ambient temp close?

Edit:

Just saw the cable comment.. yeah I could see a power draw. I have shitty old phone cables around until they don't work 100%
Some charge my phone faster then others and their all the same.

 

[xocyrusx]

Where I’m at in Tampa over the past 6 months it’s been 70 to 90 but all with the same range. Warming up to the same outside temp before shooting.

As it’s deteriorating in speed don’t think it’s a temp issue.

 

[Mike_in_FL]

I’m in Florida so it’s hot and fuckin hot.

Truth.

 

[xocyrusx]

Was the temperature of the ammo the same and ambient temp close?

Edit:

Just saw the cable comment.. yeah I could see a power draw. I have shitty old phone cables around until they don't work 100%
Some charge my phone faster then others and their all the same.

That’s kinda what I was thinking…

I have never checked the battery state but the battery that was in there was at 0.7 and the other was at 9.2.

I agree it’s a draw battery issue with the cable.

And after some deep ripping apart the old gun junk box we all have I think I found some of the OEM cables.

Will do some testing and get some new batteries.

 

[CA48]

I was having issues with mine recently and replaced the cable, that fixed them. I’ve also had issues when the batteries got low it wouldn’t read or it would give a random number. A consistent distance to the bore helps. Mine will throw some crazy numbers if I start to get it to far away from the bore.

 

[xocyrusx]

I was having issues with mine recently and replaced the cable, that fixed them. I’ve also had issues when the batteries got low it wouldn’t read or it would give a random number. A consistent distance to the bore helps. Mine will throw some crazy numbers if I start to get it to far away from the bore.

Thanks that’s what I was thinking. Going to have to give this a try with a new cable.

Slightly low but alignment wise I think I’m good. Thoughts?

 

[Mike_in_FL]

The hotter it is the higher resistance is, i.e., reading in ohms of the copper in a cable. With these tiny cables these days if you bend it and break strands now there's less conductors to carry the current needed. And they're all made in China.

 

[gigamortis]

When I switched from .308 to 6.5, I had to increase the sensitivity adjustment to get good numbers on the 6.5. My reloading regimen is thorough, and I knew there was no way I was getting the ES / SDs my Sporter was reporting. My waterline at 800 on target was extremely tight, suggesting single digit SDs were in fact happening. I bumped up the sensitivity from what I was running with my .308 and started getting numbers that made sense.

 

[spife7980]

Thanks that’s what I was thinking. Going to have to give this a try with a new cable.

Slightly low but alignment wise I think I’m good. Thoughts?

View attachment 7960412View attachment 7960413

The top of the rod is the max you should be away. You’re almost twice that away from the bottom of the bore.

 

[xocyrusx]

We

When I switched from .308 to 6.5, I had to increase the sensitivity adjustment to get good numbers on the 6.5. My reloading regimen is thorough, and I knew there was no way I was getting the ES / SDs my Sporter was reporting. My waterline at 800 on target was extremely tight, suggesting single digit SDs were in fact happening. I bumped up the sensitivity from what I was running with my .308 and started getting numbers that made sense.

i will have to give that a try…. I’m going to do some testing on Friday morning. I ran at 7 for this last testing but will go higher.