22lr at 900 yards

I can keep 1.25 to 1.5" groups at 100 yards. 200 yards on a great day i might get 4" 300 yards i can hit a pop can once or twice out of 10 rounds once dialed in. If no wind. Shooting in evenings over a dead flat river really help spotting my own shots
 
Got Juice? said:
Actually, when you look at the flow dynamics, a subsonic round experiences supersonic turbulence along it's surface. As the air accelerates around the nose, these turbulent areas do affect the stability of the projectile.

This was discovered on airplane wings long ago.
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One little tidbit the folks breaking records at the Salt Flats had to consider is that the tires would break the sound barrier at just 380 mph, as the tops of the tires are traveling through the air at twice the speed of the car (while the bottoms of the tires are stationary on the ground)
 
yodave said:
I too was under the impression that 1050 FPS 40 grain at 300 was the equivalent of .308 155 grain bullets at 1000 in a palma rifle......if we're wrong please correct us, pretty sure that's what I read and hence the reduced rimfire F-class shoots at 1-2-300 meters on appropriately scaled targets
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When I started shooting my rimfires at 200 I was told by Paul Reibin of Range sports Unlimited where i got my targets from that it was 200.
maybe he was wrong, I dunno.
I could run the numbers through my quickload but that seems like too much work ! LOL!
Suffice it to say I have a whole bunch of fun when I do shoot them at 200, maybe I'll go out to three again as well.:dancingbanana:
Cat
 
RabidM4U5 said:
It can happen, random acts of accuracy do occur, but "all day" is physically impossible due to the (lack of) consistency in factory made rimfire ammunition. A peruse of the following thread on RFC demonstrates this very clearly, where 50 shots are taken at a single target at 200 yards and MV data is recorded with a chronograph. Results in the 4inch range are from the top performers. 2" "all day" just isn't happening. h ttps://www.rimfirecentral.com/forums/showthread.php?t=1129343 The following target is an example.

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Rabid and I don't always agree, but here he's right as he often is. Random acts of accuracy can and do occur but they are not regular nor can they be expected. My post was not intended to be controversial and it is not a theory. It is physics.

flyr said:
He is not saying you won't hit your plate at 200 or 300.
I think he is saying you won't hit a 2" plate at 200 and a 3" at 300,with any consistency.
Even if your gun and ammo shoot sub .5 at 50yds.
JMHO
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A tip of the hat to someone who read what I wrote.
 
kodiakjack said:
One little tidbit the folks breaking records at the Salt Flats had to consider is that the tires would break the sound barrier at just 380 mph, as the tops of the tires are traveling through the air at twice the speed of the car (while the bottoms of the tires are stationary on the ground)
Click to expand...

There was a vid of that happening. Scary watching the bubbles form and flow on the surface... until they started aerodynamically separating....
 
kodiakjack said:
One little tidbit the folks breaking records at the Salt Flats had to consider is that the tires would break the sound barrier at just 380 mph, as the tops of the tires are traveling through the air at twice the speed of the car (while the bottoms of the tires are stationary on the ground)
Click to expand...

5:41 talks about the acceleration of flow and subsonic shockwaves on the bullet surface at overall subsonic speeds.


Of course bernoulli's principle tells us with differences in pressure gradients there will be a lift component acting on the bullet on the skin... a little rotary wobble is introduced.
 
Got Juice? said:
5:41 talks about the acceleration of flow and subsonic shockwaves on the bullet surface at overall subsonic speeds.


Of course bernoulli's principle tells us with differences in pressure gradients there will be a lift component acting on the bullet on the skin... a little rotary wobble is introduced.
Click to expand...

Amazing video.
 
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