Or use a brake if you're at a range... The difference between a mod and a brake is night and day in terms of mirage!
It's one of the main reasons I run brakes for PRS as a pose to mods!
Ben
Thankfully we have banned muzzle brakes to their own evening at the tunnel range...with COVID we are down to two lanes at a time, but when we were at four lanes and somebody used a muzzle brake it was horrible for anyone either side...you get the full blast and useless to try for accuracy getting buffeted.
Though talking of heat shimmer....in certain weather conditions the whole tunnel gets steamed if someone forgets to put the extractors on...like here...

