The wind

[ENCORE50A]

Besides us modern youngsters to the sport, does anyone use a ballistic app (electronic) to determine wind corrections in either....

MOA

MRAD

Inches

Clicks

 

[bestill]

I use range confirmed ballistic app with flags and wind meter.. all my correction are MOA. with1/4 click scope

 

[ENCORE50A]

I use range confirmed ballistic app with flags and wind meter.. all my correction are MOA. with1/4 click scope

I downloaded Strelok to a tablet. Are you familiar with that app?

 

[bestill]

Ive never used strelok but i hear it a goodern. Ive used jbm ballistics .
Also for wind i use moa reticle to make corrections when wind is variable not constant

 

[ENCORE50A]

How about some comparing using the following data........... SHOOTING AT A 300 YARD TARGET.

SCOPE's current zero is at 100 yards.

Bullet weight: 300grs
Bullet BC: .230
Velocity: 2,300fps
Wind 15mph
Wind direction: 46° (NE)
Temp: 59°F
Pressure: 29.53
Altitude: 1,200

Strelok calculates a vertical adjustment of: 5.02 MOA - MRAD 1.46 - Inches 15.75"
Strelok calculates a horizontal adjustment of: 9.44 MOA - MRAD 2.75 - Inches 29.65"

How about some calculations from those who happen to shoot a heavier and slower bullet?

 

[bestill]

Are those200 yd calculations?

 

[ENCORE50A]

Are those200 yd calculations?

With your scopes current zero set for 100yds, Strelok says to shoot at 300yds, those are the adjustments needed under those conditions. :wink:

 

[ronlaughlin]

It seems to me the moa adjustment should be nearly the same as the inches adjustment. In my experience, to shoot 300 yard with that load would need about 15 moa up.

 

[ronlaughlin]

No, 15 moa is too much at that MV, it would be closer to 10 moa up.

 

[bestill]

Encore50,
Your calculations are correct for 300 yds with a 200 yd zero.
If 100 yd zero it would be 8.8 moa ele. 27.7"
9.3 moa wind 29.3" for 300 yds

 

[bestill]

My 327 mh load zero at 100yds
300 yd correction 15 mph wind
6.25 moa ele 18.9"
4.25 moa wind13"

 

[ENCORE50A]

Encore50,
Your calculations are correct for 300 yds with a 200 yd zero.
If 100 yd zero it would be 8.8 moa ele. 27.7"
9.3 moa wind 29.3" for 300 yds

Makes a difference when you don't fat finger, which I did..... :lol:

However, that gives me a somewhat different result

Vertical 8.76 moa 27.52"
Horizontal 6.86 moa 21.54 inches

 

[ENCORE50A]

My 327 mh load zero at 100yds
300 yd correction 15 mph wind
6.25 moa ele 18.9"
4.25 moa wind13"

Does your calculator give you the option of the actual wind direction, such and in degrees?

 

[bestill]

Your last post elevation good but wind looks to be 10 mph

 

[ronlaughlin]

How can 6.25 moa equate to 18.9". Yes, i am quite confused. To me it seems your bullet should be fly over 100 yard mark at about 6 1/2" high to be zero at 300 yard. What does the 18.9" mean?

 

[ENCORE50A]

Your last post elevation good but wind looks to be 10 mph

Did you use 15mph and a wind direction of 46°?

When I use 10mph and 46° it indicates a hor. correction of 4.56 MOA and 14.33"

 

[bestill]

My bad i ran for true90 degree cross wind. Your numbers are good

Ron,
Moa correction is based on 100 yds so if you need6 moa correction at 300 yds you times6 moa bye 3 for 300 yds which eguals 18" of actual correction. This works at any ddistance
Say its 425 yds and takes 14.5 moa of correction actual would be
14.5 x 4.25=61.5"

Say you take a string and tie on barrel and go to 100 yds thru a point6" high ontarget and continue that path to 300 yds you will intersect target18" high ok now figure bullet drops18" so bullseye
But correction of scope is still6moa

 

[ENCORE50A]

My bad i ran for true90 degree cross wind. Your numbers are good

Ron,
Moa correction is based on 100 yds so if you need6 moa correction at 300 yds you times6 moa bye 3 for 300 yds which eguals 18" of actual correction. This works at any ddistance
Say its 425 yds and takes 14.5 moa of correction actual would be
14.5 x 4.25=61.5"

Say you take a string and tie on barrel and go to 100 yds thru a point6" off center or target and continue that path to 200 yds you will intersect target12" of center
But correction of scope is still6"

I didn't think that two different apps. could be that far off.

Now.......... have you verified by shooting your app.? When shooting, do the recommended changes relate on the target?

 

[bestill]

Encore,
Rerun for 100 yd zero 300 yd shot 15 mph at 46 degrees
8.8 elevation
6.8 windage
We keep posting back and forth with a different base line this is your original post info. App are same. These numbers are reference only and will get you close will need range to confirm.
I shoot3 shoot group at 50 yd increments to 500 yds then with known chronograph reading i adjust b.c. to get ballistic chart for my individual gun to match actual range work.

 

[ronlaughlin]

....Ron,
Moa correction is based on 100 yds so if you need6 moa correction at 300 yds you times6 moa bye 3 for 300 yds which eguals 18" of actual correction. This works at any ddistance
Say its 425 yds and takes 14.5 moa of correction actual would be
14.5 x 4.25=61.5"

Say you take a string and tie on barrel and go to 100 yds thru a point6" high ontarget and continue that path to 300 yds you will intersect target18" high ok now figure bullet drops18" so bullseye
But correction of scope is still6moa

Ahh... yes indeed that makes perfect sense. Thank you so much for clarifying! Me, i was stuck at 100 yard, and just couldn't see it.