Siting in... 7mm/08

Try to find a shooting range tomorrow to take some shots out to a 100 yds. I wouldn't trust it until then.

Thanks, LSUenvy, that's the plan. U was just curious if any OB experts could offer any insight as to where the gun may shoot now out to 100 yards based in being 1/2 inch high at 25.

Thanks, ChadRabbit... I agree. I will definitely shoot it out at 100 before he hunts. I don't think he will be able to shoot it again though before the hunt. I was just trying to get an idea as to where it may be as is out at 100/150 yards. I know it moves from 25 out to 100, just didn't know for sure how much it actually does.

Yes - should be about good IMO. That's not far off from how my 7-08 is sighted in and I feel confident with 100-150 yard shots no problem.

I also agree that ideally you'd shoot at 100 to be sure.

I try to sight all my rifles in 2 in high at 100 yards.

At 25 yards, your point of impact should be low if you are dead on at 100. If at 25 yards your about 1/2 high, you're going to be pretty high at 100 (I would guess)

Here's a decent illustration:



The red line is your line of sight through the scope, the blue line is the bulled trajectory. As you can see, if you're dead on at 25 yards (the two lines intersect), you will be high at 100 yards. That means if you're high at 25, you will be even higher at 100. How much higher depends on the ballistics of the round you're shooting.

You should be on the paper at 100 yds, but if you are shooting at a range where you have access to sandbags you can easily check the bore sight. First pull the bolt out of the action. Then put the rifle on sandbags and, looking through the bore, line the bore up with the bullseye on your target. Bed the gun in as best you can so it doesn't move. Then look through the scope to see if it is on the bullseye or relatively close. If not, adjust the scope until the crosshairs and the rifle bore are both looking at the bullseye. I've done this with dozens of bolt rifles and have never been more than 2 inches off the bull on my first shot. You can dial it in from there.

Set this table up with 1.5" scope over bore using a Federal Accubond 140gr with a ballistic coefficient of .485 with a muzzle velocity of 2800fps. Chart will be more accurate with more exact numbers but this will get us close.

This is what you currently have.



100 yard Zero



I would go with a 200 yard zero which will give you point black +/- 2" from 0 to 225 yards. 100 yard zero you are inside of 2" only to 175 yards. Sight in at 1 3/4" high at 100 yards. Put the crosshairs in the kill zone from 0-200 and you should have a dead deer without worry about holdover or whatnot. Edit to add if you know the max range of your shot won't be past 150 then the 100 yard zero if fine.

Not sure which ammo you have but I ran one on a 140gr core lokt and this is what it spit out:

7mm-08 Remington - 140gn Pointed Soft Point Core-Lokt - MV: 2960fps BC: 0.381

Set Sights To Shoot -0.73 Inches Low at 25 Yards for a 100 Yards Zero

Set Sights To Shoot -0.56 Inches Low at 25 Yards for a 150 Yards Zero

I would think you would want to be at least .5 low at 25 to be on at 100. This is just my estimation though.