Sighting in at 150 yards

[MeccaOz]

Hey guys Does anyone sight in their 308's at 150 yards, all the ballistics Ive read on the caliber would indicate this to be Idea almost lazer like out to just under 200 yards. If not, what do you recommend ?

[Chronos]

What weight bullet and how fast? I can run it through a ballistics program for you

What beast? I would have thought closer to 200m for the best mpbr in say a 4" vital zone

Chronos

[Shotfox]

Most people I know sight in at 100 only because it is easier to judge that distance out in the field unless you have a rangefinder. Again you have to take into account calculating MOA on your scope turretts as most are 1/4 MOA and rounding off 1 MOA at 100, 2 MOA at 200 is just eaiser to calculate in your head if you have to.Also when you develop a Ballistic cheat sheet you will have even more numbers to look at. The 308 is a hefty calibre and shooting out to long range requires skill and the less numbers you have to deal with the easier it is to adjust the range and make that kill.

[MeccaOz]

168gn Nosler Ballistic tip at around 2700fps in .308 Thanks heaps Chronos

[Shotfox]

Go to www.gseven.com for a great ballistics calculator or www.hornady.com

[MeccaOz]

Thanks for the link Shotfox. The reason I was asking is because of that fact, If I was sighted in at 150yards There seems to be very little tragectory drop out to around 200 yards or so I have seen when looking at the numbers. Anyone know of a ballistics program that will work on linux ? Again thanks for the links mate

[Chronos]

168gn Nosler Ballistic tip at around 2700fps in .308 Thanks heaps Chronos

Okay mate, I've done three tables the first one is with a 100 meter zero. The next one is with a 150 m zero, the third is zero at 200 m

You may find it easy to say zero 1" to 1 1/2" high at 100m if that's the range you have access to.

Chronos

.308 168gr nosler BT at 2700fps

100 m zero



150 m zero



200 m zero



These are done on "Ballistic" an app on iPhone

[MeccaOz]

Thanks heaps Chronos , I owe you a beer

[Chronos]

Thanks heaps Chronos , I owe you a beer

No worries mate

You might see that a 200 m zero will hit less than 2" high at 100m and just over 2.5" low at 300m. Could be a good zero for large game such as deer or big pigs at any range from zero to 300m without worrying about clicking up or down. I'd dare say the 168 BT even at 300m would still take care of most pigs

Chronos

[Baldrick314]

I sight my 308 in at 200 yards. Hits about 1.5" high at 100. No idea what it does at 300 cos I haven't shot that far but it shouldn't be a huge drop

Also shooting 168gr projectiles

[MeccaOz]

Thanks again guys. All the input helps alot

[1290]

Thanks heaps Chronos , I owe you a beer

Don't hand him that beer just yet....
you'll note that the drop between the 0 and 50yds figure goes from -1.5"(scope ht) to positive (except for the 100m table) as the trajectory crosses the zero datum, on the rise, then and comes back down to the zero - the first crossing point is also a zero which is a lot easier to 'set' and check, this is usually at 20 to 25m for a 308 type chambering = exactly the same result as zeroing at 200 or so metres...

If you want to use the MPBR methods, play with a calculator, inputs your variable and the zero for a 4 or 6" target zone may be say 230m for the 308....

OK, You can have that Beer now Chronos....

[Chronos]

Don't hand him that beer just yet.... you'll note that the drop between the 0 and 50yds figure goes from -1.5"(scope ht) to positive (except for the 100m table) as the trajectory crosses the zero datum, on the rise, then and comes back down to the zero - the first crossing point is also a zero which is a lot easier to 'set' and check, this is usually at 20 to 25m for a 308 type chambering = exactly the same result as zeroing at 200 or so metres...

If you want to use the MPBR methods, play with a calculator, inputs your variable and the zero for a 4 or 6" target zone may be say 230m for the 308....

OK, You can have that Beer now Chronos....

Pfft! The glass is warm by now and the beer long gone

All good 1290. I used a 5" vital zone in those tables because for deer or big pigs that's probably pretty close.

I'm getting my head around this stuff myself at the moment because for every gun I've ever owned I've had data for each load and clicked up to the desired range.

That's all well and good for target shooting where you can take sighting shots but as I do more hunting I'm finding I just want to take the gun from the safe and know that my first shot will be on target give or take an inch at 100m

I'm sighting in my .308 tomorrow using 150gr factory ammo which is also new to me. I've probably only ever bought 140 rounds of factory and 100 of that was 2 x hornady .204 Vmax bulk packs (50 rounds)

Chronos

[Lorgar]

I'm sighting in my .308 tomorrow using 150gr factory ammo which is also new to me.

The new Tikka, yes?

[Chronos]

The new Tikka, yes?

Yes mate. I've got to test some hand loads and see what it likes but mostly my goal is to get a 200m zero with factory 150gr winchester or federal sp ammo. That will workm on anything I plan on hunting and will work well with my range finder which has ballistic ranging and will give me drop in clicks or inches for any range.

Chronos

Here's the handloads, .5 gr steps of 2208 loaded behind 130gr Speer hp, 150ge SST, 150 gr NBT and 165 gr sierra GK

[Lorgar]

It makes me half cringe seeing the box with all that different ammo for testing.

So glad I'm done with it

Let us know how it goes

[RDobber]

It's a Tikka, we all know it will go