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FX Crown100yd accuracy Part 4- THE WIND

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Ghostranger169

Ghostranger169

Member
Jun 9, 2019
673
133
Lamont, FL, United States
I decided to shoot 100 yards OUTDOORS today in the WIND, using the new "low power" setup(see previous post-Part 3) on my Crown Continuum with 700mm slug liner to see the effects it would have on a JSB 18g at approximately 874fps. The wind was variable 5 to 10mph coming mostly from behind me(toward the target), but gusting back and forth sometimes from the right and sometimes from from the left. I set up stakes with flagging tape every 10 yards out to the 100 yard target. 

I decided to shoot 4 magazines(72 shots) of JSB 18g(876 fps) onto 1 target using the same hold point(center of the target). This is the resulting group:

1589068233_14189082355eb741c97d3618.39848991.jpg


I then decided to see what effect this wind would have on a .25 JSB King(ave. 890fps). So I switched to my .25 FX Wildcat, which was zeroed at 100 yards and used the same procedure(72 shots) to shoot this group:

1589068385_9862597275eb74261aa83f5.18685416.jpg


Interesting that the heavier .25 Kings at 890fps seemed to get blown around about the same? I then decided to switch back to the Crown with the JSB 18g and practice shooting some targets "for score" in the wind, trying to watch flags and learn when to shoot. I loaded up a mag straight out of the tin(like I always do). I decided to shoot holdover/hold-off since I am familiar with that(from hunting). Plus it is faster than clicking and the wind was changing directions so quickly. This was my first "scoring target"(I know they aren't real tournament targets):

1589068866_10264897165eb74442696ed2.04742163.jpg


Encouraged by this 1st target, I thought "Well that's not TOO bad. I'll just clean this up a bit, take a few more sighters, watch the flags a little closer, keep my sighters OFF the scoring targets, and get ALL the shots near/in the red on this next target".

Wrong. WRONG. Next target please:

1589069231_16730072455eb745afdbb772.41812608.jpg


Ugh, worse. I decided that I had been shooting a long time and was getting tired, so I decided to take a break. Then the wind started to lay down(ruining the test), and one beer led to another and I figured it was time to call it a day. 

I was really surprised at which combination of flags I had to watch try to determine which way the pellet was going to drift. Sometimes 2 flags 10 yards apart would be almost straight out going the opposite directions? And all combination of directions as the wind effect "rippled" toward or away from me? If anyone has any advice or suggestions about how to learn/shoot in the wind at 100yards, I am all ears!
 
Wind happens. It is good to learn what it takes to shoot in it.

Watch Ted's video of "how he won extreme benchrest". He talks about how much time he spent out shooting in the worst weather to learn his setup.

https://youtu.be/TNONcrNmWDE

Is the barrel of the Wildcat smooth twist? (only on the muzzle end) and the Crown is STX. Even though you were shooting pellets out of a slug liner. Maybe the stx liner is that much better? The designs are apparently pretty close between FX slug liners and pellet liners. So much so that the newest .25 "Superior" barrel design is marketed as the one stop solution for pellets and light slugs.

The 18.1gn JSB .22 is a really nice pellet design. Almost the same B.C. as the 25.4gn .25 pellet. And so, almost the same possible accuracy in wind. Cheaper and use less air.

The B.C. is .035 for the .22 versus .038 for the .25.

You have to be able to make it to at least 56 fpe with the JSB 33.4 Heavy MK2 at a B.C. of .046 to see a big advantage for the .25. Those start to get expensive at $0.063 per shot versus $0.038 for the .22 heavies.

https://hardairmagazine.com/ballistic-coefficients/
 
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Sendler2112,

Thanks for the input and suggestions. The .25 Wildcat has a STX liner and I can't remember it failing to put 3 mags(24 shots) inside of 2.25"ctc when wind was calm. While not as "dialed in" as the Crown, I thought it would be a good "rough" comparison. 

Thanks for the links on the wind and BCs, and for sharing your experience. I will definitely check those out. 

I know this isn't the typical "glory" post where anyone can chime in and say "Good shooting", but it is honest and I hope people will find it interesting. I would like share the PATH(warts and all) that will hopefully lead to the "glory" posts of successful 100 yard accuracy in the wind. Thanks again for your input
 
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Subscribed! 👍🏼

Because it's not a glory on-one-of-19-target-cards shooting post —

but a real life shooting precision post. 



🔶 I might be compelled to post some of my real life results for analysis by the specialists.... 🤔 



🔶Please, keep the advice coming on how to learn effectively to shoot in the wind. 😊 



Matthias


 
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JungleShooter,

Thanks for the support!

I know that I am fairly "new" to posting so much info on AN, but this year(pandemic) has put a lot more free time to my life. Back in December/January, I had planned to begin travelling to airgun tournaments in 2020. Now, with everything that is going on, I don't know when.

I have viewed(and hopefully will continue to see) many posts of "cherry-picked" groups, which DO require shooting skill, good airgun, time and effort, etc. I am NOT "knocking" them. They are a GOOD thing. And I know people are proud of them and want to share them(as any of us would want to do). And it IS great and fun to see what shooters CAN do with their airguns. 

I think, SOMETIMES, some people see those posts and feel bad that they aren't able to achieve the same result(or think those are "normal" every single time) with their airgun of same make/model/kind? Or they don't understand what may or may not be different? It's just that I wanted to try an approach of giving a lot more of the background and preparation that leads into(hopefully) getting more accuracy from an airgun, becoming a better airgun shooter, etc. And share that info(good, as well as, not-so-good) with whoever wants to view my posts. If that's not your "cup of tea", just don't look.

I welcome all positive or negative feedback; as long as it is constructive. Thanks again for your input and support.
 
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Stormy,

Thanks for your question. It was just an offhand comment about how it is interesting(maybe counter-intuitive to some) that one HEAVIER projectile(.25 JSB King 25g) and one LIGHTER projectile(.22 JSB 18g) fired at roughly the same speed, would be effected by the wind about the same amount. But of course, it is explained by their ballistic coefficients being similar. Thanks for making that point clear
 
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Ghostranger, the BC of JSB 18 vs JSB King is pretty same. Why whould you expect less wind drift from the latter one? 100 yards in wind is a task for JSB .30 or slugs.
Click to expand...

True, in my testing the BCs of those two pellets are about identical. But to say 100 yards on the wind is a task for .30 isn’t a reflection of your statement about BCs. The .30 Exact has a BC only slightly better than the .22 JSB 18.1 or the .25 JSB King 25.4. Maybe about 10% better. Not a great amount. So if the .30 is drifting 9 inches the other two will drift about 10 inches. Better, but nothing to write home about. Slugs however, are a different story...
 
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