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  #691  
Old 06-05-2019, 05:31 AM
Triggershoe
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Quote:
Originally Posted by gcrank1 View Post
Imo, the 'odds' of the 1st shot often being the 'hot one' wouldn't/couldn't consistently be the luck of drawing a higher velo load out of the box. It would possibly be some of them, sure, but would make me consider it is something else as the primary causal factor.
Fwiw, when it matters to me I use every opportunity to use shoot sighters/warm-up shots.
I know I need all the help I can get.
I'm in that camp. When I said a "break" in shooting I'm talking about perhaps a 15 to 20 minute break between shot strings. For me, this break is usually due to a 200 yd walk downrange to check sighters or to score the first record target before walking back and starting on the second target/string. I'm not sure WHAT the cause is, the main variable being that the rifle/bore has "cooled", BUT I have seen the first shot go high (after resuming shooting from the break) more often than not. If at all possible, I will shoot a round into the berm before continuing on the second record target. If permitted, there is certainly no harm in doing so.
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  #692  
Old 06-05-2019, 08:07 AM
jaia
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Y'all are messing with me.

Bad enough I'm slightly OCD, but now y'er gonna have me tracking first shot results too.

Final delivery of rimfire ammo showed up.
Norma magnum rimfire (all CCI production with a Norma label on it)
Couple more Aguila, Armscor, Gemtech, Geco
and the remaining flavors of CCI that finally became available
plus the Eley made Remington target 22lr ammo.

That should get me through the summer.

Few more of y'all should shoot some and add to the list.
It's handy to have other rifles, ammo and shooters to compare with.

Last edited by jaia; 06-05-2019 at 08:09 AM.
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  #693  
Old 06-05-2019, 01:34 PM
Eaglehunter

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I would love to contribute as well but my local range only goes out to 100 yards. The longer distance range is just too far for regular visits.
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  #694  
Old 06-07-2019, 08:53 AM
jaia
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EH, give the RFC CZ 100 yard rimfire challenge a try.
Every month a new target. Some targets for score, some for group size.
22lr, 22wmr, 17hmr, 17hm2 are all allowed, as are other brands of rifles.
I'd still be involved, but the 200 yard bug has got a serious grip on me.

Last edited by jaia; 06-07-2019 at 08:56 AM.
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  #695  
Old 06-09-2019, 09:09 AM
jaia
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So much for the cold bore theory.
Both hit low. 22lr and 22wmr.

Reinstalled the Feddersen stubby 22wmr in the 455 SOF.
Sinclair bipod with rear bags, Mueller 8-32x44 target scope

Winchester Dynapoints 45 grain CPHP 22wmr, rated 1550 fps





One odd dropper...didn't match the mv. No idea why.
Maybe deflected off of one of the giant horseflies buzzing around the range.

Last edited by jaia; 06-09-2019 at 12:24 PM.
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  #696  
Old 06-09-2019, 12:33 PM
jaia
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CCI Clean 40 grain Polymer coated 22lr, 1235 fps

455 Varmint, Lilja, Sinclair





Bulk plinking ammo. Red, White or blue coating.
Asymmetric bullets, canted seating, two were tilted to where they would not chamber.
No problem, 100 in the box, plenty left to take their place.
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  #697  
Old 06-09-2019, 12:43 PM
jaia
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Norma 40 grain CPHP 22wmr rated 1885 fps

CCI styrene box, CCI manufacture date code, CCI mv spread
Yep, It's CCI 22wmr with a RUAG headstamp and Norma label stuck on it.

455 SOF Feddersen stubby, Sinclair, rear bags




Last edited by jaia; 06-09-2019 at 12:45 PM.
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  #698  
Old 06-15-2019, 04:58 PM
jaia
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CCI AR Tactical 40 grain CP 22lr, rated 1200 fps

CZ 455 Varmint, Lilja, Sinclair





120 fps ES, visible bullet defects...plinking ammo
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  #699  
Old 06-15-2019, 05:04 PM
jaia
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Aguila 22 Target 40 grain 22lr rated 1080 fps

CZ 455 Varmint, Lilja, Sinclair




2 ftf, extracted, rotated 120 degrees, bang on the second try



Visible swaging seams on some of the bullets.
Partial ridges on the sides and nose of the bullet.
Has to affect the aerodynamics.

Last edited by jaia; 06-15-2019 at 08:02 PM.
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  #700  
Old 06-15-2019, 05:08 PM
jaia
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CCI AR Tactical 40 grain CP 22lr rated 1200 fps

455 Varmint, Lilja, Sinclair



Close inspection of the bullet nose shows dents and dings and odd bumps on the surface.
Irregular bullet shapes don't help with producing repeatable trajectories.

Last edited by jaia; 06-15-2019 at 08:00 PM.
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  #701  
Old 06-18-2019, 11:40 AM
jaia
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My OCD kicked in.

Got to wondering: just how many boxes of ammo have been tested for the 50 at 200?

Would you believe 201? Yep, I counted them.

201 x 50 = 10050 shots fired and posted so far.

2 cases of rimfire down the tubes, ranging in price from 4 cents a round to a dollar a round.

Took a year to do it, and still more to go.
Who knew there were that many brands/types of rimfire out there?

If you have a 17 hm2 or a 5 mm, send some at 200 and post the results.
Neither of those in my collection of rifles.

Good thing I'm easily entertained.

Last edited by jaia; 06-18-2019 at 11:44 AM.
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  #702  
Old 06-18-2019, 12:47 PM
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Imo, this makes for an impressive database.
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  #703  
Old 06-18-2019, 04:58 PM
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Quote:
Originally Posted by jaia View Post
My OCD kicked in.

Got to wondering: just how many boxes of ammo have been tested for the 50 at 200?

Would you believe 201? Yep, I counted them.

201 x 50 = 10050 shots fired and posted so far.

2 cases of rimfire down the tubes, ranging in price from 4 cents a round to a dollar a round.

Took a year to do it, and still more to go.
Who knew there were that many brands/types of rimfire out there?

If you have a 17 hm2 or a 5 mm, send some at 200 and post the results.
Neither of those in my collection of rifles.

Good thing I'm easily entertained.
So many brands , so little time .
LOL
I find your experiment to be very interesting and an informative read . Thanks for sharing! Kirby
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  #704  
Old 06-23-2019, 07:32 PM
jaia
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I've been digging and reading for several months now.
Ever since I sent 50 at 200 with Eley Contact and Eley Force.
Same bullets, one subsonic, one supersonic, similar results.
Started me questioning the effects of supersonic transition on the 22lr.
The only actual study done with the 22lr is this one...

https://drive.google.com/file/d/1zut...ew?usp=sharing

Page 11, Conclusions: paragraph 5...




What does that last line read?
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  #705  
Old 06-23-2019, 08:06 PM
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Quote:
Originally Posted by jaia View Post


What does that last line read?
I can understand how limit cycle yaw would change retained velocity or wind sensitivity, but wouldn't a bullet that takes a persistent yaw in the last 50m of it's journey tend to "fly" in the direction of the yaw?

Does this mean the yaw always in the same direction?
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