3 inches high at 100 yards

[A. F Medic]

I am shooting a Savage 110 FP using Hornady 165 grain Boat Tail Match ammo. It is capable of shooting "clover leafs" at one hundred and two hundred yards. Sighted in at 2 inches high which puts me on at 200 yards. My question is, "What would be the dead on if I sighted it in at 3 inches high at 100 yards?

Is there a table for hold overs at 300, 400, 500 yards for a 3 inch sight in? Where I hunt pasture poodles (chucks), I could take shots up to 600 yards
.

I would appreciate any information that can be passed along.

Not related, but I went to the Remington Co web site for their ammo ballistics and I do not understand the chart. At 500 feet (not yards) their .308 bullet drops 54 inches.

Is this something new?
Maybe I am wrong.....Firearms Comparison - Shotguns Comparison - Rifles Comparison - Remington Guns Comparison

Information

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[vintage hunter]

Without knowing your rifles caliber, barrel length, muzzle velocity or the bullet's BC it's difficult to say what the range would be, but assuming you have a .308 with at least a 22'' bbl and a MV of 2600-2700fps my guesstamation would be around 230 yds.

[Bill Hollinger]

Around 240 to 260 would be my guess.

[enfield303t]

Obviously a .308?

I have a table for 168 gr. travelling at 2,700 fps. with a sight height of 2 inches.
Temperature 70 F and humidity of 30% and a ballistic coefficient of 0.422

Sighted at 200 it shows the following
100 1.8 inches high.
200 0.0
300 -8.3 inches
400 -24.2
500 -49.1
600 -84.9
700 -133.5
800 -197.6
900 -280.3
1000 -384.9

I think 3 high at 100 would be very close to your estimate of 230 being 0.0.
Hopes this helps.

[vintage hunter]

Try to find a copy of Mike Lau's book ''The Military and Police Sniper'', it's full ballistics and wind drift tables that would be useful to you. If you can't get hold of it PM me you're address and I'll make some copies of the tables and send them to you. What type of reticule does your scope have? I do have some ''hold over'' data for the .308 w/168gr MK's but it only works with a mil-dot reticule.

[Patrick Chadwick]

Get hold of a copy of the Sierra Rifle Reloading Manual. Towards the back there is a large chapter full of ballistic tables. There is enough information for a wide range of calibers, bullet weights and muzzle velocities to enable you to make a very good estimate.
But you need to know (or have a very good idea) of
... the muzzle velocity
AND (easily overlooked)...
... the height of the sight line above the barrel center line. With telescopic sights this can make a noticeable difference to the result.

Patrick

[enfield303t]

My table was sent to my by a friend who is really into perfection in shooting. It came via a company called jbmballistic.com

They are out of New Mexico if this is any help.

[Patrick Chadwick]

Dear A.F. Medic,

I think it it time you told us WHAT caliber you are shooting, WHAT the muzzle velocity is, and WHAT type of bullet. It is fun doing these guessing games where the questioner presents sub-minimal information, but some facts would help!

However, it is raining heavily outside, so leaving the garden alone and plugging on with the meagre information you presented, and assuming that it is a .308" diameter bullet, then the 2 clues that the weight is 165 gns and it is a Hornady boat-tail match ammo suggests that the bullet is a "30 cal .308 165 GR Interbond" or similar. In which case, the BC is 0.477.

Taking this data, and your statement that it is set 2" high at 100 yds to be dead-on at 200, and inserting it into my German software, I get an interesting result:
EITHER the muzzle velocity is in the region 2700 fps, and the sight line is about 2" above the barrel center line - i.e. you are using a scope (or some very strange iron sights)
OR, if you are using iron sights about 1" above the center line, then the muzzle velocity is above 3000 fps.

... which illustrates why one needs to know the muzzle velocity, ballistic coefficient, and sight height in order to answer your question with any kind of accuracy.

The "zeroed" distance in both cases is about 210 meters = 230 yards

I hope I have guessed right - at least it matches the other two estimates - but more info at the outset would reduce the guesswork!

Patrick


P.S: What is a Savage 110FP ?