I zero my 30-30 to strike 2 inches high at 100 yards. This puts me right on at 150 yards.

TR

 

You could use Hornady's ballistic calculator to find out:
Ballistics Calculator - Hornady Manufacturing, Inc

Keep in mind, there's no substitute for actually shooting at 50 and 100 yards to know for sure.

 

You could use Hornady's ballistic calculator to find out:
Ballistics Calculator - Hornady Manufacturing, Inc

Keep in mind, there's no substitute for actually shooting at 50 and 100 yards to know for sure.

Also you might want to copy
Ballistics Calculator - Hornady Manufacturing, Inc cheat sheet and tape it to your butt stock for reference. Bearhands do you know the Muzzle Velocity BC the high of your sights? if you are shooting factory ammo look on the box for this info. in order to use the Ballistics Calculator. If not I would think you are in a 3" 10 ring at a 100 yds with a dead on 75 yds. sight in. Do you have a pic of your 75 yds target?
TO NY
PS This ballistic calculations is for the 336-30 30 using hornady's 150 gr. RN. sighted in at 75 yds. with 1 1/2" sight height.

RANGE(YARDS) VELOCITY(FPS) ENERGY(FT.-LB.) TRAJECTORY(IN) COME UP IN MOA COME UP IN MILS WIND DRIFT(IN) WIND DRIFT IN MOA WIND DRIFT IN MILS Muzzle 2300 1762 -1.5 0 0 0 0 0 25 2190 1597 -0.5 2 0.6 0 0 0 50 2083 1445 0 0 0 0 0 0 75 1979 1305 0 0 0 0 0 0 100 1879 1176 -0.5 0.5 0.1 0 0 0 125 1782 1058 -1.7 1.3 0.4 0 0 0 150 1689 950 -3.5 2.3 0.7 0 0 0 175 1600 852 -6.1 3.4 1 0 0 0 200 1515 764 -9.6 4.6 1.3 0 0 0 225 1434 685 -14 5.9 1.7 0 0 0

Your Input Variables Ballistic Coefficient 0.186 Velocity (ft/s) 2300 Weight (grains) 150 Maximum Range (yds) 225 Interval (yds) 25 Drag Function G1 Sight Height (inches) 1.5 Shooting Angle (degrees) 0 Zero Range (yds) 200 Wind Speed (mph) 0 Wind Angle (degrees) 90 Altitude (ft) 0 Pressure (hg) 29.53 Temperature (F) 59 Humidity (%) 0.78 Ballistics Results - marlin 336 30 30 RANGE(YARDS) VELOCITY(FPS) ENERGY(FT.-LB.) TRAJECTORY(IN) COME UP IN MOA COME UP IN MILS WIND DRIFT(IN) WIND DRIFT IN MOA WIND DRIFT IN MILS Muzzle 2300 1762 -1.5 0 0 0 0 0 25 2190 1597 0.7 -2.6 -0.8 0 0 0 50 2083 1445 2.4 -4.6 -1.3 0 0 0 75 1979 1305 3.6 -4.6 -1.3 0 0 0 100 1879 1176 4.3 -4.1 -1.2 0 0 0 125 1782 1057 4.3 -3.3 -1 0 0 0 150 1689 950 3.7 -2.3 -0.7 0 0 0 175 1599 852 2.3 -1.2 -0.4 0 0 0 200 1515 764 0 0 0 0 0 0 225 1434 685 -3.2 1.4 0.4 0 0 0

So at 75 yds I would sight in 3.6" and you will/should be at minutes of deer (in 3" 10 ring & 9 ring from muzzle to target out to 225 yds.)

 

Depends somewhat on what you are hunting. On deer a 75 yard sight in would work within 100 yards or so. Probably a bit further. If you are worried about longer ranges you need to do as suggested and sight in a bit high at 100. They used to recommend sighting in at 25 yards and you would be dead on at some other longer range, never really worked for me but was recommendation. Best to sight in within your conditions. Shorter range can be a little off at the longer ranges.

DP

 

A 25 yard zero = a 125 yard zero, with a 170g Remington factory offering.
But I always set this up at 100 yards.
This setup gives you, +0.8 @ 50, +1.2 @ 75, +0.9 @ 100, -1.7 @ 150, -4.2 @ 175 and -7.6 @ 200 .
All of the shots I have made with a 30-30 have been under 150 yards. If your within a inch of your aimpoint, the deer will not know the difference. :biggrin:

 

Just me and the areas I hunt in, but most of my scoped firearms are 2" high at 100 yd. That works for me, others might want more or less. 75 yd is too close for a zero on a 30-30 in my mind, it shoots flatter than that out to 175-200 yd, with Hornady bullets anyway. DP

 

I normally use Hornady 160 gr FTX for deer. I zero at 50 yards which puts me about 2" high at 100 yards and back to zero at 200 years. Works very well for me.

Bob

 

What oly444 said... lol

 

0 yards: -.9
25 yards: -.13
50 yards: .19
75 yards: 0
100 yards: -.74

 

Another option.

Some guys don't care for having to judge how high they need to shoot when aiming at distances beyond that which they sighted in there rifles.

Example. I sighted my rifle to be on at 75 yrds so how high do I need to aim at 150yrds. Oops, the deer just walked 12yrds further away, ßo how high do I aim now. Etc etc

For these individuals there is another option.

Let's say your shooting a 150gr flat point
In this case you could sight your rifle in at 3" high at 100yrds

This would in turn have you "on" at 200yrds and your bullet would not drop more than 3" below your point of aim until a distance of apx 225yrds.

Basically from 30yrds <-------> 225yrds you will be either + or - 3" from your point of aim.
This is very reasonable for hunting deer sized animals, and likely more accurate than trying to judge distance and bullet drop in the field.

 

My Texas Hill Country shots rarely exceed 75 yards , and are usually much less.
With 170 grain cast bullets I zero factory iron sights at roughly 1" high at 25-30 yards and go hunt.
Point the Marlin, and pigs, deer, *****, 'yotes, tin cans, donkey turds, and other things just die...
WHAT FUN!!!

 

Your certainly going against the norm. As most if not all folks get set up at 100 yds. The difference between 50 or 100yds is so marginal it`s really not worth talking about.
I`ve seem the "facts" some have posted. Certainly gives you a "visual" aid .

If you have a reason for 75 yds, by all means.... go for it.

 

This is what I would load notice that the energy level is above 1000 lb throughout the 250 yds. This load makes it ethically usable for deer throughout this yardage.

Your Input Variables Ballistic Coefficient 0.330 Velocity (ft/s) 2300 Weight (grains) 160 Maximum Range (yds) 250 Interval (yds) 25 Drag Function G1 Sight Height (inches) 1.5 Shooting Angle (degrees) 0 Zero Range (yds) 225 Wind Speed (mph) 0 Wind Angle (degrees) 90 Altitude (ft) 0 Pressure (hg) 29.53 Temperature (F) 59 Humidity (%) 0.78 Ballistics Results - Marlin Zane Grey 336-30 30 RANGE(YARDS) VELOCITY(FPS) ENERGY(FT.-LB.) TRAJECTORY(IN) COME UP IN MOA COME UP IN MILS WIND DRIFT(IN) WIND DRIFT IN MOA WIND DRIFT IN MILS Muzzle 2300 1879 -1.5 0 0 0 0 0 25 2237 1778 0.7 -2.6 -0.7 0 0 0 50 2176 1682 2.4 -4.6 -1.3 0 0 0 75 2116 1590 3.7 -4.7 -1.4 0 0 0 100 2057 1503 4.5 -4.2 -1.2 0 0 0 125 1998 1418 4.7 -3.6 -1 0 0 0 150 1941 1338 4.5 -2.8 -0.8 0 0 0 175 1885 1262 3.6 -2 -0.6 0 0 0 200 1829 1189 2.1 -1 -0.3 0 0 0 225 1775 1120 0 0 0 0 0 0 250 1722 1054 -2.8 1.1 0.3 0 0 0

This is a basic calculation. A sighting of 4.5" above X ring at 100 yds. with this load and the elevation guess work is not needed.
TO NY