Astigmatism and shooting

[kuziakin]

Here what is it an -> astigmatism

[blackcat_attilio]

Here what is it an -> astigmatism

Thanks! It might be interesting.

[blackcat_attilio]

Hello everybody! ...I did it again... I was at the range and I shot my M91/30 without use my glasses. To be honest I tryed also with "the stuff" you wrote me about (not bad!), but the best results were without glasses. I must talk together my eyes doctor.
Anyway I'm satisfied of the results. What do you think?

[Patrick Chadwick]

Blackcat, that is fine for shooting without glasses, but it's a few euros more spent on ammunition that you could have used towards getting correct glasses. Which could have improved the grouping. I don't like having to wear glasses, but I do like getting better results!

It looks fine for a typical service rifle with typical ammo. The problem is that if you want to improve on that, where do you start?
Rifle? Ammo? Holding? Sighting? Firing? A Mosin-Nagant with open sights is not the best choice for such a test.

You need to get the best possible rifle and fire it off a sandsack or in a good rest to see how much difference good glasses can make. Say, for example, that the glasses could reduce the spread by 1 MOA. It will be hard to see the difference with a rifle/ammo combination that only shoots a 4 MOA group. But if you use (borrow?) a rifle that shoots 1/2 MOA, then you can see the difference much more clearly. A left-handed friend has a Keppler match rifle that shoots sub-1/2 MOA. With that rifle, we can see that our groups lie about 1 inch (1 MOA) apart, presumably from the left/right dynamic difference. But if we both shoot a standard K98k with the traditional V-sights, the spread is large enough that this difference is not apparent.

Patrick