Figuring how much to raise front sight

[NavyVet1959]

You might want to try this ballistic calculator and plug in a few what-if type numbers to get an idea of what range your rifle might have been signed in at.

http://gundata.org/ballistic-calculator

Rough guess is might be sighted in for 300+ yds.

[NavyVet1959]

Here's a better ballistic calculator that will allow you to play with the ballistic coefficient, current sight zero, distance from bore to sight, and such:

http://www.hornady.com/ballistics-re...ics-calculator

You should be able to plug in some values into it and determine what distance the current sights might be set for.

Assuming 1800 fps, a 0.370 ballistic coefficient, a 200 gr bullet, and 1" between bore and sight, it looks like it is currently zeroed for 755 yds.

If this is right, it means that at 100 yds, you'll be 66.3" high and at 425 yds, 174.1" high.

Measure your actual distance between the bore and the sight and put in your bullet's ballistic coefficient and see what you come up with.

Maximum range using that calculator is 2000 yds, so if you're curious about what .303 British used as artillery would do...

[brstevns]

Here's a better ballistic calculator that will allow you to play with the ballistic coefficient, current sight zero, distance from bore to sight, and such:

http://www.hornady.com/ballistics-re...ics-calculator

You should be able to plug in some values into it and determine what distance the current sights might be set for.

Assuming 1800 fps, a 0.370 ballistic coefficient, a 200 gr bullet, and 1" between bore and sight, it looks like it is currently zeroed for 755 yds.

If this is right, it means that at 100 yds, you'll be 66.3" high and at 425 yds, 174.1" high.

Measure your actual distance between the bore and the sight and put in your bullet's ballistic coefficient and see what you come up with.

Maximum range using that calculator is 2000 yds, so if you're curious about what .303 British used as artillery would do...

Thanks