Sighting in 243

dreher

When sighting in your scope at 25 yards, where do you want the bullet to strike in relation to the 25 yard bullseye to have the bullet actually dead on at 100 yards? Like so many things, once upon a time I knew this, now I can't remember. Thanks. I should add that I just do the 25 yard to get on paper so I can start the serious dialing in.

Floyd58523

If the ammo you are using is factory load, look at the box and it will tell you the bullet drop. Different size and weight bullets will have a different drop.

sandwarrior

dreher,

In general you want it about 1" low. That's based off a 1-1/2" high scope center over the rifle bore center.

When you check it @ 100 then you will be close enough to adjust from there as to how far out you want to zero. It never hurts to go back to 25 yds. and see exactly where you were hitting when zeroed where you want to be.

Edit:

Play around with this awhile and see what you want to shoot where to get where you want to be at long range:

http://www.jbmballistics.com/cgi-bin/jbmtraj-5.1.cgi

oneoldsap

Put them in the bull , and then move to 100 Yds. A Rifle sighted in at 25 Yds. isn't ready to go hunting .

Hawkshaw

Go to any bullet mfg. web site, and go to their ballistics soft-ware program. You can plug in any cartridge, bullet, B.C., velocity, and print out your chart accordingly. I tend to use Hornady's HAWKSHAW

Mobuck

Most centerfires in the velocity range of the 243 when sighted to hit center @ 25 yards will be close to center @ 200 yards. This is dependant on the height of the scope above the boreline. A scope mounted on extra high or see-thru rings will be much higher at longer range.

dreher

1" low is the figure that was in my mind, just wanted to verify that. I tend to be lazy when dialing in a scope. I shoot 1 shot at 25 yds. This will almost always be on the paper. I adjust to center, and bring it in about 1" low. I can usually do this in 3 maybe 4 shots. Close enough that I can easily see bullet holes for making my adjustments. Then I move the target out to 100 yds and get serious. Usually by starting at 25 yds. I save a bunch of time and ammo. Last Fall my third 3 shot group was centered and 1 1/2" high at 100 yds. Total of 12 rounds to sight in for deer season. During season, 4 shots, 4 deer. I love starting at 25 yds.

sandwarrior

dreher,

I went and tested mine today @ 25 to see where it would hit @ 100. Mine took about 3/4" low to hit @ 100.

Man was it ever hot here today!

keystone1974

Ur not talkin bout a 300, or 308... But sighted in at 25 yds is 1 1/2 high @ 100yds; and on the money at 200 yds... Sum heavy 308's are 1/4-1/2 low at 200yds sighted in at 25 yds. Know ur talkin bout 243... But thinkin their pretty close