Googled, couldn’t find much at all on this topic. Anyone experience thermal drift with RMR’s?
Thank you.
I have not experienced it with the RMR or the deltapoint. This is in the 100+ degree el paso heat.
I haven’t experienced it in a year of carry
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But I’ll say, at distances you’re going to shoot a handgun, you’re more likely to experience shift from temperature sensitivity or the ammo…but odds are you’re not good enough to notice.
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I would agree that any shift when used with a handgun aren’t going to be significant, but a lot of people are using them on rifles. That being said, I haven’t noticed any. I run a RMR on a Larue offset ring mount.
For clarity, I was particularly interested rifle mounted RMR’s. Thanks!
Dude it doesn’t matter what you have it mounted on, if the RMR has thermal drift problems it will manifest on pistol, rifle or whatever you have it on.
Say there is a 2 MOA drift from -20 to 140 degrees.
Say you’re an expert pistol shooter and shoot in this complete range.
Let’s say you shoot at 25 meters each outing.
The alleged thermal drift will show 1/2" at 25. How many shooters can hold 1/2" at 25?
So is it a problem that manifests on a pistol? I am not so sure most would notice.
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Thinking along these lines as well.
And to add to that, anybody experienced with precision rifle will find they may see 20-30fps change in velocity per 20 degree shift due to temperature sensitivity of smokeless powder. How much shift from ammunition is confused with “thermal drift”?
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I had a RMR screen fog up in a high humidity situation and since it was dusk, it made the dot scatter, becoming unusuable.
I found wiping the screen only slightly improved the visibility. After that incident, my nine month try out ended on top of a Glock 19. The RMR had too many compromises for me such as wiping down a RMR screen on a loaded Glock in a crisis situation .
That said, no actual thermal shift was discerned, just a totally obscured view.
Sounds like you need catcrap.
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RMR 07 - It had a RainX prophylaxis on the screen when the fogging occurred, which was the recommendation at that time to make removing debris easier and preventing fogging.The environment was a very low lying patch of marshy ground with dew point conditions at dusk. Also humid from AIWB in 90 degree heat.
Maybe Catcrap would have helped versus RainX. The blue tint on the RMR was an issue at dusk usually, but a total Charlie Foxtrot when fogged. The dot scatter reflection made it difficult to look over the RMR and use the horns to frame the target.
The fog was impossible to wipe off, likely due to the atmospheric conditions and a hot gun. I also verified it was not debris in the emitter channel, which I thought was an initial cause.
Relative to this OP’s query, this is why I sold the RMR rather than putting on a rifle.
I found a fogging situation where it was totally worse than having nothing.
Yeah he didn’t ask about fogging. He asked about drift.
RainX is a no-no on optics. It contains chemicals that penetrate lens coatings. It says right on the package “Not for use on coated lenses”. What happened is that the RainX penetrated your lens coatings making the surface abrasive; therefore impossible to just “wipe” off.
I’ve been carrying an RMR gun for 2 years and using catcrap. I live in one of the most humid areas in the country. I’ve not experienced fog with proper application of catcrap once every few months.
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