Math Question

jimmyj said:
I need a higher front sight for my Rossi Model 92 .44 Magnum Rifle. (dove tail cut)
My choices are: .315, .420, and .500

Which is higher ?
Click to expand...

You say you need a "higher" front sight. Unless you know the height of the sight already on your gun there's no way to tell if any of these sights are higher. Measure your existing front sight and the answer should then be obvious. :confused:

And just to make sure, you do know that a higher front sight will lower point of impact, right?
 
Last edited:
There is a simple math calculation to determine how much higher your new front sight needs to be to get the impact change you want to make. You need to know the distance in inches between your front and rear sight, the distance in inches of the target from you and the difference in inches you want your point of impact to change. Example, 25 yds is 900 inches. 4” lower point of impact. 20” between your front and rear sight. Divide 4 by 900, multiply the answer x 20 = .088. So in this example an increase of 88 thousandths, .088 of your current front sight would lower poi 4” at 25 yds. Got it?
 
It is necessary to know the desired distance to the target and by how much the POI needs to be lowered. Then it is a simple application of similar triangles to calculate how much higher the front sight needs to be.
 
DWalt said:
It is necessary to know the desired distance to the target and by how much the POI needs to be lowered. Then it is a simple application of similar triangles to calculate how much higher the front sight needs to be.
Click to expand...

Why a four year old child could understand this. Run out and get me a four year old child, I can't make head or tail out of it. - Groucho Marx in Duck Soup
Click to expand...

I could have resisted, but I didn't try very hard.
 
Last edited:
The Skinner Front Sight Calculator may help. Does invilve some calculating, though.

With the Skinner sights, you can order one taller than needed and file it down, but it sounds like you're looking at Willams of Marbles, whcih come in fixed heights.

If you have any way of fabricating a temporary front sight (durable enough to survive a few rounds of .44 mag.) you can cut/file it down at the range, which should give you a good idea of which sight height will work best.

Best to use a pair of calipers to measure the height, although you could use a small steel rule marked at those sight heights. .315" is a bit over 5/16" (.3125), .420 is a bit under 7/16" (.4375).
 
Not attempting to do a thread hi-jack, but must mention this as I feel quite strongly about the subject of mathematics.....

I'm a math person (probably one of my best and favorite skills) and use it every single day of my life! Quite honestly, I do believe being good at math is a major reason that people excel in their business, job, career and at life. To be able to figure out things in your head almost instantaneously separates the math "Wiz" from the average "Joe" and gives them distinct advantages. I am blown away each and every time I deal with Clerks, Cashiers, shop owners, etc. that can barely manage to give correct change and mostly rely on the cash register to tell them what to give back to the customer.

As my Wife always says, she spells and I do the math. I am not the best "speller" but make a concerted effort to improve every day. That is why many of my posts have been edited after the initial post - not to change the content but to correct spelling - I guess I should be more careful prior to hitting the post button - lol. Can't be proficient at everything - but Math is certainly one of the MOST important IMHO.

And, BTW......... It's NEVER too late to learn to be better at it. People who struggle at math will be amazed at the improvements in their lives when they become better at it. It changes their whole outlook and IMHO can improve their lives.
 
Last edited:
riverrat38 said:
As in "the dog ate my homework"!
Didn't work when I was in school; it won't work now.

73,
Rick
Click to expand...

HA - LOL.....

I ONCE did have to write a note and sent in my sons chewed up and shredded homework because one of our Golden Retrievers actually did destroy it! That dog (Chester) LOVED to eat paper. Since my son was an A+ student and never had any prior homework issues, this true story was actually accepted by the teacher. That said - this was the exception and you are correct - most time it doesn't fly.
 
chief38 said:
HA - LOL.....

I ONCE did have to write a note and sent in my sons chewed up and shredded homework because one of our Golden Retrievers actually did destroy it! That dog (Chester) LOVED to eat paper. Since my son was an A+ student and never had any prior homework issues, this true story was actually accepted by the teacher. That said - this was the exception and you are correct - most time it doesn't fly.
Click to expand...

Amazing what a little bacon grease on a half finished paper wll get a dog to do!
 
Actually both.

“Geometric shapes, also called figures, are an important part of the study of geometry. The triangle is one of the basic shapes in geometry. It is the simplest shape within a classification of shapes called polygons. All triangles have three sides and three angles, but they come in many different shapes and sizes. Within the group of all triangles, the characteristics of a triangle’s sides and angles are used to classify it even further. Triangles have some important characteristics, and understanding these characteristics allows you to apply the ideas in real-world problems.”

Triangles
 
chief38 said:
Not attempting to do a thread hi-jack, but must mention this as I feel quite strongly about the subject of mathematics.....

I'm a math person (probably one of my best and favorite skills) and use it every single day of my life! Quite honestly, I do believe being good at math is a major reason that people excel in their business, job, career and at life. To be able to figure out things in your head almost instantaneously separates the math "Wiz" from the average "Joe" and gives them distinct advantages. I am blown away each and every time I deal with Clerks, Cashiers, shop owners, etc. that can barely manage to give correct change and mostly rely on the cash register to tell them what to give back to the customer.

As my Wife always says, she spells and I do the math. I am not the best "speller" but make a concerted effort to improve every day. That is why many of my posts have been edited after the initial post - not to change the content but to correct spelling - I guess I should be more careful prior to hitting the post button - lol. Can't be proficient at everything - but Math is certainly one of the MOST important IMHO.

And, BTW......... It's NEVER too late to learn to be better at it. People who struggle at math will be amazed at the improvements in their lives when they become better at it. It changes their whole outlook and IMHO can improve their lives.
Click to expand...

Those are profound words. Everyone here take note.

The question herein is easy. Geometry was my favorite subject, although most of my classmates at the time didn't do well. And yes, Geometry was a high school year math class.

My teacher always provided an extra question for an extra 10 points. My average for all the exams that year was 110. My final grade was 92. It was still highest in the class, but boy was I mad.
 
One could say that trigonometry is the subset of geometry which is specific to the measurement of triangles. Many believe that trig is a very difficult branch of mathematics, but it is actually quite simple. Basic trig principles could easily be learned in one afternoon by anyone proficient in simple algebra, as there are only two laws to be mastered - the Sine Law and the Cosine Law, plus the trig identities of Sine, Cosine, and Tangent (which are merely ratios of the lengths of the sides of triangles). Understanding trig is essential to moving into the more advanced branches of mathematics and also physics.
 
Last edited:
You must log in or register to reply here.

Similar threads

eveled
Front sight insert.
Replies
6
Views
215
eveled
eveled
D
  • Locked
Want To Buy Want to buy a Rossi 92 safety (stainless if possible)
Replies
0
Views
87
DeafSmith
D
S
Red Front Site Insert Needed for 686
Replies
21
Views
1K
Palmetto Sharpshooter
Palmetto Sharpshooter
Dump1567
  • Locked
For Sale WBP Jack AKM 7.62x39 Rifle
Replies
0
Views
58
Dump1567
Dump1567
gfors
New to Me, My Old Rossi
Replies
22
Views
559
Ivan the Butcher
I

Latest posts

Back
Top