[sgtbpm]

I'm curious, I have a 338 win mag, I want to sight it in for about 200 yards however all I have is a 25 yard place to do this. at 25 yards where should I be hitting the paper for 200 yards, I'm using a standard 3-9 x 40 scope

 

[RIKA]

Hi Sgtbpm,

What brand of bullet are you using? What shape (spitzer, RN, BT etc)? What bullet coefficient? What bullet weight? Whats the velocity? Most reloading books (thinking of Speer) have a section in the back of the book where you can calculate zero point and bullet drop out to at least 500 yards. Its easy to work this out but you need to provide more info.

RIKA

 

[sgtbpm]

Well this is the best I can do, I using Winchester's
338 Winchester Magnum
200 gr. Super-X® Power-Point®
Product Symbol: X3381

Ballistic Coefficient: 0.308


Super-X® Power-Point®: Unique soft nose jacketed design delivers maximum energy on target. Notches around jacket mouth improve upset and ensure uniform, rapid expansion.
Description:

Packaging Options
Rounds Per Box: 20
Box MSRP: $35.30
Rounds Per Case: 200
Case MSRP: $353.00



Rifle Ballistics

Distance (yds) Muzzle 50 100 200 300 400 500
Velocity (fps) 2960 - 2658 2375 2110 1862 1635
Distance (yds) Muzzle 50 100 200 300 400 500
Energy (ft. lbs.) 3890 - 3137 2505 1977 1539 1187
Distance (yds) 50 100 150 200 250 300
Short Trajectory (in.) 0.5 0.9 0.0 -2.3 -6.1 -11.6
Distance (yds) 100 150 200 250 300 400 500
Long Trajectory (in.) 2 1.7 0 -3.2 -8.2 -24.3 -50.4


Box Top
Box Side

 

[RIKA]

Sgtbpm,

The ballistic coefficient for a 338 spitzer of .308 sounds a little low. The 200gr Speer spitzer has a BC of .448 - all the other weights are higher.

Distance (yds) 50 100 150 200 250 300
Short Trajectory (in.) 0.5 0.9 0.0 -2.3 -6.1 -11.6

From the tables quoted above, if you have a 150yd zero you should be .5in high at 50 yds and 2.3 inches low at 200 yds. If I were you, I would sight it .5 high at 25 yds and try to find a 100 yd range. That way you can verify your sighting.

I'm sorry but this is the best I can suggest and if I'm wrong, somebody please correct me.

Hope I haven't misled you but that is what I would do in your circumstance.

RIKA

 

[andy]

never trust such paper-patch stuff, man. If you are going to be using that 338 for real, go FIND a place where you can shoot 200 yds. If you can afford 338 ammo, afford the sort of hunt one USES a 338 on, you can PAY some landowner for the right to shoot on his property, or make a trip to wherever there's such a range. Get in touch with the NRA, they will know where such a range is, not all that far from you. I used to drive 350 mile round trip, twice a month, just to shoot a couple of pistol matches, when I was making $6 an hour in a factory. You're either serious or you're not. Which is it?

 

[Aslan]

Well, GK I agree with you to a point. I use my .338 on everything from coyotes (fairly regularly, deer, Elk, and Bear.) Those hunts don't cost anything other than the cost of a license or a tag. Also, once again, because the ammo is expensive, you have to be condescending. (plus we know how you hate recoil)

I agree on the best thing to do is shoot at the ranges in which you intend to use the gun. However, since I am assuming that this sighting in is to get on paper and to get close to where it should be prior to going to a longer range.

I would not feel bad at all if it was the only rifle I was allowed to hunt medium and larger game with. (It is a tad much for rabbits though)

I'm shooting 225gr barnes X bullets. I'm getting 2950 out of them (chrono'd). I just don't recall off the top of my head where I'm at at 25 yds.

All my tables and notes are packed at the moment. (thursday I will be finally moving.) Otherwise I'd be happy to post in detail.

:devil:

 

[Rich Z]

I assume you are eventually going to actually site the rifle in at 200 yards right? Because if you don't have the vertical line of the reticle on the scope exactly perpendicular with the centerline of the bore, and the scope exactly aligned with the barrel, it is very unlikely that your bullet impact horizontally will be the same at 200 yards as it is at 25 yards. Of course, then on your end, you have to be holding the gun exactly perpendicular to the ground as well.

I think trying to get a scope mounted EXACTLY perfect on a rifle could drive me crazy some day.....

 

[sgtbpm]

Thanks for the Info guys, so far I don't have a 200 yard place to shoot. I will in october so I will be able to get it out to 200 before rifle season starts.