I'm quizzical about your flair for encountering flare so much so that it's your no.1 enemy. I would also suggest that you use the sunshade that comes included with March riflescopes. I am a YUGE proponent of sunshades and their principal use, for me, is to protect that huge, expensive objective lens.
First off, I always use a hood if I have one. There’s two scopes of mine that don’t have hoods in a test I reference below (since rectified one of them), but I’m not referring to them here outside of that test.
My main pdog field scope is a Razor G2 4.5-27, and it has a 4” long excellent hood with a great flat matte finish inside.
I am a pdog shooter. Almost always, I cannot change targets or general shooting direction in order to avoid shooting under/into the sun.
For most of the day, this is not a problem. But towards the end of the day, I’ve often found myself shooting east into the setting sun. It’s a function of where the great fields are located around my shooting area, I suppose.
The sun is not in the image circle of course. I’d be blind! But it’s above and typically to the right or left.
What happens with the Razor is a loss of contrast and the image starts washing out. It’s not end of the world but it prematurely ends the shooting session.
I did an informal flare test here (w/hood and without):
Here is an unscientific (and flawed) BACKLIT flare resistance test of four scopes I own. I aimed them under a setting sun during one single session. It’s flawed in the way that I didn’t have shades for two of the scopes. Plus dust, flare from improvised sunshades, and possible flare from a...
www.snipershide.com
Now, the test has its flaws, but I was downright flat-out amazed at how well the NF NX8 4-32 did and how crummy the S&B 5-25 did.
One more thing, and it’s important. I am NOT interested in flare tests under 20x. I found that zooming out quickly eliminated flare. But with tiny targets in the evening, I can’t zoom out.
So a flare test, for me anyway, is conducted from 20x upwards. Not sure if it matters, but it might: I also conducted it a ways out, ~500yds. I typically shoot from 200-450yds, but that day there was a deer at about 520-530yds.
I sort of think that conducting a test like this at 100yds or closer might skew the results, but I might be wrong.
I was looking at the effect on the image in general, and not trying to split hairs with an Air Force resolution chart. The differences between scopes was dramatic, so my rough approach satisfied my requirements.