bigpapa

When sighting in my .308 what yardage should I use ? 100 yards or 200 yards? And if I sight it in for 100 yards how low or high will it be at 200 yards?

bigpapa

Piss. Sorry for got to add I'm using 180 grn. Remington CoreLockt cartrages. Me gun likee likee thems a lot.

Duckbutter48

if you zero rifle at 100 itll be about 5 inches low at 200 with 180 Winchester ammo which should be real close to what the Corelokts will do.

http://www.winchester.com/products/catalog/cfrlist.aspx?cart=MzA4IFdpbmNoZXN0ZXI=

If you go here you can click on the different rounds to see what the trajectory is. Should be pretty close to what you are shooting.

GRIZZLYMAN

If you have access to a range with 200yds or even 300yds use it. I would personally sight in at 200yds (or 300) and shoot at 100yds for reference. If you have only a 100yd range, I have always sighted in 2 inches high to compensate for 200yds. This is a general rule of thumb, but hasn't failed me in the past with my 30-06, which has similar balistics. If you want the exact drop at 200, go to Remington's web site and look up the balistics for your load. Hope this helps.

HeviShot

180 grain CoreLokts shoot about 4" low at 200 yards out of my VLS. My rifle loves them as well, more accurate than I expected.

Roskoe

I sight just about all of my big game rifles to print 3" high at 100 yards. For the .308, this will put you right on around 250 and maybe six inches low at 300 yards - depending on the bullet and load. For a 7 STW you could hold right on out to almost 400 yards with a 3" @ 100 yards zero. For a .50 caliber muzzle loader, the point blank range approaches 200 yards with the same zero.

Despite all the charts and ballistic programs out there, I highly recommend you go to a range where you can shoot at longer distances to confirm what the computer says. Usually you are real close and, if nothing else, its a big confidence booster (or not) to have actually shot at the distance you might feel is your maximum effective range.

Mr. Zesterhouse

download SHOOT ballistic calculator and figure uot the max point blank range.
just punch in your load, barrel length and stuff like that and it'll tell you exactly what you need to know.

bigbulls

I like to use a MPBR of 3 inches when sighting in my rifles. Meaning that I sight them in to hit no more than 3 inches (or real close to it) above line of sight (cross hairs) at any distance beyond the muzzle.

Assuming (you will have to actually shoot to verify this) that you reach published velocities of 2620 fps I would sight it in to be 3 inches high at 100 yards. This is about as high as the bullet should travel above your cross hairs. This will put the bullet back to zero at about 220 yards and three inches low at about 255 yards. At 300 yards you should be aproximately 8 inches low.

Again, you must go to the range to make sure that this holds true for your particular rifle.

Coyotestalker

I support the 4 inch drop with the 180 gr. if sighted in at 100 yards. If I may ask, what are you using the 180 grain beefers for????

skeeter 7MM

I like others use the +-3 rule when sighting in for typical hunting situations. However their are hunts and guns where I may trim my sight in for the specific purpose. So it depends on what you expect to see in the field?? If 100-200 yards are the norm (200 being long side but realistic), then I'd sight in so your zerod for 200 yards. According to rems ballistic program to achieve a 200 zero with 180 gr corelokt you'd need to be approx. 2 1/4" high at 100. This would give you approx -3 low at 240 yard. If you think you'll need more range then adjust your 100 yard sight in up as suggested. If you'll never shoot 200 then drop her down closer to the bull at 100 (approx. 1" will give you 150 zero)

Of course these are just starting point you 'll need to verify how your gun shoots the ammo ateach distance.If required make the appropriate adjustments to meet your goal.

Best of luck