Midas + 22LR BC ??

[kzin]

Faster .22LR ammo is indeed more sensitive to wind than slower .22LR ammo, but that has nothing to do with transonic turbulence.

What accounts for it, then?

Above and below transonic faster is LESS sensitive.
According to everything I've seen.

 

[grauhanen]

As good an explanation as has been put together, complete with graphics, is the one found in here in post #29 by Landy (HuskerP7M8), who posts excellent information on .22LR ballistics on many forums https://www.rimfirecentral.com/thre...high-velocity-ammo.501239/page-2#post-4550603

 

[kzin]

So it may not be exactly transonic "turbulence" but it absolutely is transonic weirdness in general.
Right?

My explanation has been "weird shit happens around the speed of sound". I think I can stick with that.

 

[grauhanen]

What do you suppose happens to .22LR rounds around the speed of sound that would be weird?

 

[kzin]

wind sensitivity goes up with velocity which is backward from highpower and common sense

 

[dutch14]

Bullets push a shock wave while they are above the speed of sound. The shock wave has the effect of increasing the surface area that the wind has to act on thus increasing the wind drift while the bullet is above the speed of sound. My ballistics program shows about a .1" difference at 50 yds and a 1" difference at 400 yds. Learning to read the wind better would most likely help more.

 

[kzin]

Bullets push a shock wave while they are above the speed of sound. The shock wave has the effect of increasing the surface area that the wind has to act on thus increasing the wind drift while the bullet is above the speed of sound. My ballistics program shows about a .1" difference at 50 yds and a 1" difference at 400 yds. Learning to read the wind better would most likely help more.

The calculator I use shows a lot bigger difference. More like 4" at 200 yards. (10mph 90deg wind)

Learning to read the wind is not optional!
Ammo choice is.

 

[Ggmac]

One gun of mine at 300 yds required 59 min of elevation almost 1 degree another gun on the same day same ammo only needed 48 min . Go figure. Its fun to be able to see the bullet and you’re saying to yourself, Its too high , then it starts dropping and .... right where its supposed to go .
27” barrel required 59 min and 22” barrel required 48 min .

 

[dutch14]

I'll agree but the difference is in favor of the standard velocity ammunition.