.257 Wby Mag Sight-in

<< < (3/4) > >>

Bill,  what were you sighted in before and what factory  ammo ?  100's spitzer or sp ?  On a regular ol day how accurate is the rifle 1 "  ?    That 257 is so fast with a 100 grainer I really don't think it makes a whole lot of difference if you sigh in between 2 to  2 1/2 " high @ 100 yds,  always better off to shoot and verify and  zero @ 200 , 250, 300 yds anyway just to make sure and have a little more confidence in your set up.   I do agree if you sight too high @ 100 and you mis judge  ranges it's way possible to over shoot at the lesser range yardage something around 150 to 175 yds  mid arch bullet path depending on rifle.   I really think it's how much a person shoots the rifle and how comfortable they are at longer ranges.  My problem is I shoot a bunch of different rifles and hard for me to remember each one,  so on non tactical scopes  that I don't click up.   I usually set the scope @  2 " high and leave them,  and make a little cheat sheet taped on the rifles butt stock or slipped under the butt stock shell holder  to remind me of the drops.

Is it true that sighting in at 25 yards is the same as 200 yards?
The indoor range where I purchased my 257 is only 25 yards and the dude at the gun shop said 25 is the same as 200 so mine is 1" high at 25 with 120 partitions
I shot a few 100 yard rounds at deer camp and they landed a few inches high so that sounds about right...........I guess?
Shoot sorry Bill didn't mean to cut in on your post.............good luck dirty knapping some speed goats


I had made a mental mistake and sighted in one of my rifles at 1.5" high at 25 yrds and on opening day missed a buck.  Went back to camp and set a 100 yrd target and found to be 8" high at 100.  Depending on the velocities dead on at 25 will put you dead on at about 250+ yrds, 1" high will put you dead on at almost 400 yrds.  Depends on what you are going for

It's a bad idea to try and sight in at 25 yds for a flat shooting caliber.  Any off the cuff  rules of thumb  are speculation,  all rifles and calibers are different.    The bullet isn't  asleep yet for one.   If you get on jbm and set your zero range at 25 yds and range increments at 25 yds,  plug in you bullet & bc,   fps,  scope heigth and altitude you will see how far you are.     An example  my 257 using a swift scirocco 100 gr 3550 fps, 6500 ft elevation and scope heigth of 2.250 "  high.  It  figures out if you shoot dead center at 25 yds,   @ 100 yds  you are 5.7 " high,  and 300 yds you would be 11.8 " high,   and zeroed @ approx 525 yds.   Jbm can be corrected  with your input for zero ranges that you are looking for,  but again  the bullet isn't asleep yet and  the bullet may be pulling in one direction or another until you get to approx 100 to 200 yds.  If you had this knowledge and specs ran prior and decided to try and sight in @ 25 yds it would get you ball park and that's about it.   If I were to take that same scenero and plug in jbm with a zero of 200 yds my sight in @ 25 yds would be  minus 1.3 " .    That's probably about right.    I actually do this at times when I put a new scope on a rifle and go out and sight in to get me on paper and save ammo.   I will shoot a couple rounds @ 25 yds then back it out to 100 then farther.   When you measure scope heigth go from bore centerline to scope center.  I use a snap on  6"  steel ruler and make an educated guess for scope heigth.   The higher the scope the flatter it will shoot,  some people think the lower the scope the flatter it shoots and this is incorrect,  it's not a whole lot of difference , but some non the less.

Frank the Tank:
I have a 257 Wby Mark V Lasermark and will be hunting antelope with it for the first time this October.  Have been shooting the gun quite often this year with both reloads and factory loads.  My gun shoots the 100 Gr bullets the most acccurately.  My first piece of advice would be to chronograph the factory load that you plan on shooting (assuming you are shooting factory loads).  I have found the chrony values can differ quite significantly from what the published velocity is.  If you only plan on shooting 200 Yds, the differences would be somewhat insignificant.  Sight in 1-2 Inches high at 100 Yds.
I respect your decision to shoot within a range that you are comfortable with.  However, you are nowhere near utilizing the performance capabilities of a 257 Bee.  I know it can be quite difficult to find a range that allows targets beyond 200 Yds (depending on where you live of course).  But if you can, shoot out to 300 or even 400 Yds with the ammunition that you decide to hunt with.  You might suprize yourself.  Shooting the long distances is half the fun of having such a great long distance caliber.  Good luck!


[0] Message Index

[#] Next page

[*] Previous page