Ballistics Question

[elkaholic]

Bart i tested my Mark 4 today and came up with .2666 per click. a 2% error

Are you sure that is only 2%? My calculations show it exceeds 5%.....Rich

 

[barnesuser28]

yes .2666 x 4 = 1.0664
1.0472 divided by 1.0664 = .9819955
1 - .9819955 = .0180045
that equals 1.80045% error or about 2%

 

[elkaholic]

yes .2666 x 4 = 1.0664
1.0472 divided by 1.0664 = .9819955
1 - .9819955 = .0180045
that equals 1.80045% error or about 2%

I'm not sure how you got to this point because I don't know what range etc. you took your measurements at but .266 is approx. 6% greater than .250. Maybe I'm missing something here?......rich

 

[barnesuser28]

One angular moa is 1.0472 at 100 yards so 1.0472 divided by 4 = .2618 per click. So .2816 divided by .2666 = about 102% so a 2% error

 

[elkaholic]

Gothca! I'm a little slow but I think you're right...Rich

 

[barnesuser28]

I did the testing at 100 yards. Im going off of what Bart said

 

[Bart B]

I did the testing at 100 yards. Im going off of what Bart said

If you counted the clicks to move some amount of inches, then your adjustments will be in inches per hundred yards (shooter's MOA), not angular MOA which is about 1.0472 inches per hundred yards. That is, unless you converted them to angular MOA's.

This eternal differences for a unit of measurement's been a headache for eons. I just looked up "foot" on wikipedia and learned there were several standards used on this planet over time. And dividing each one by 12 gave an equally different lengths for an inch. Glad we don't have to deal with the 400 degrees in a circle thing that went around for a while in Europe.

 

[barnesuser28]

Bart it took 15 clicks to move 4 inches at exactly 100 yards. So 4 divided by 15 equals .2666 so 4 clicks move it 1.0666

 

[Bart B]

Bart it took 15 clicks to move 4 inches at exactly 100 yards. So 4 divided by 15 equals .2666 so 4 clicks move it 1.0666

Good job!!!

'Twould be nice to measure 10 scopes all the same make and model to see what errors they have. Betcha 3 empty .38 Special cases no two would be exactly the same and the spread across all of them would be surprising.

 

[Korhil78]

Riley,

I do have to say that is pretty good math skills and understanding of math for a 13 year old. Your parents should be proud. You seem like a pretty stand up teenager.

I would imagine that you will have a hard time finding any scope that is exactly the same as another of the same brand and model even.

 

[barnesuser28]

Riley,

I do have to say that is pretty good math skills and understanding of math for a 13 year old. Your parents should be proud. You seem like a pretty stand up teenager.

I would imagine that you will have a hard time finding any scope that is exactly the same as another of the same brand and model even.

thank you, i am a 8th grader and i am doing freshman math along with a few other kids in my class. and yes i agree that finding a scope of the same make and model that has exactly the same adjustments would be very unlikely

 

[elkaholic]

thank you, i am a 8th grader and i am doing freshman math along with a few other kids in my class. and yes i agree that finding a scope of the same make and model that has exactly the same adjustments would be very unlikely

You're only thirteen! Congratualtions son and glad you are getting off to a good start.....
Rich

 

[barnesuser28]

i have learned a LOT from this site. i tell my dad about the stuff i learn on here and he says it goes right over his head .

 

[elkaholic]

i have learned a LOT from this site. i tell my dad about the stuff i learn on here and he says it goes right over his head .

I can still relate to that