Sighting in...but at what range?

Discussion in 'The Powder Keg' started by calaper, May 3, 2008.

  1. calaper

    calaper G&G Addict

    Hi All,

    Well after being stuffed around by my gun store for 3 months, choosing different makes and calibers, i finally have my rifle. I have a T3 hunter in .243 with a 4-12x40 on top. What sort of distance should i sight this caliber and scope in at? 100 or 200 yards, or something completely different?

    Cheers
     
  2. I would personally go 100 yards, but 200 would be fine too? Is it only a range gun or is it for hunting too?
     

  3. Personally,

    I feel 100 yards would be the best distance as much game is taken
    at ranges of less than one hundred yards.

    Then I would purchase a device to tell you accurate distances beyond 100 yards in order to properly compensate for bullet drop.
     
  4. turner

    turner Guest

    623
    2
    I'd suggest with that fine quality rifle and high mag scope to sight in at 200yds (with 100gr bullets, anyway) and you'd be fine on any game, coyote and above, from muzzle to 250yds with zero correction needed. Memorize longer ranges (drops) if you might ever need them. If you decide to go with a MPBR for the same type targets and bullets then this will give you +/- 3" from muzzle to almost 300yds. You'd be zeroed with being the max 3" high at 140yds and 3" low at about 285yds. Nice rifle, good luck!
     
  5. Windwalker

    Windwalker G&G Newbie

    Good choice and good luck with the new gun.
     
  6. Ron AKA

    Ron AKA Guest

    704
    1
    Good choice in calibers. I'm with Turner on this one. I would go with 2.25" high at 100 yards. This will keep you within about 3" out to 300 yards or a bit further. If you give me the load you will be using I can run it through the ballistics program and give you a closer number. For big game I normally sight in at 3" high at 100 yards but I recall you were hunting deer and hogs? If so a little tighter would likely be better.

    Ron
     
  7. calaper

    calaper G&G Addict

    Ok, waiting to get to the the range. I think i'm going to use 100 grain projectiles to start and see how they perform, i'll have to check the book to see how much powder to load. Shooting high at 100yards sounds like it is the way to go. I like what Turner suggested, should work nicely.

    Thanks all!
     
  8. neophyte

    neophyte Wonderment :) Forum Contributor

    another thought?

    calaper: Sir; another thought? We sight in at 25yds with all firearms.
    Knowing the trajectory expectations; math it out for distance; Can and will save a bunch of time. Spotting scopes do good; not nothing like seeing it through your eyes.

    Don't have to walk as much.
     
  9. Ron AKA

    Ron AKA Guest

    704
    1
    You should be able to get about 3000 fps with the right powder in a 100 grain. Assuming this and using a 100 grain Sierra Spitzer Boat Tail, here is what the Ballistics program spits out. Sorry about the format. Your main column of interest is the first one (Elevation) after the distance. It is the trajectory. You should sight in for 2.5" high at 100. You will be 2.9" high at 150, right on at 250, and 3.5" low at 300. After 300 you should memorize the numbers as you will be into a hold over to hit with accuracy.

    Some do an initial sight in at 25 yards. As you can see if you do that, you should be adjusting to be about 0.1" low at 25 yards.

    Ron


    Load Data
    ~~~~~~~~~
    Name: .243 Cal, Sierra SPBT, 100 grn
    Ballistic Coeff: 0.430
    Bullet Weight: 100
    Velocity: 3000
    Target Distance: 250
    Scope Height: 1.500
    Temperature: 70
    Altitude: 500
    Ballistic Data
    ~~~~~~~~~~~~~~~
    Range Elevation Velocity Energy ETA Drop Max Y 10mph Wind Deflect
    0 yds -1.50 in 3000 fps 1998 fpe 0.000 sec 0.00 in -1.50 in 0.00 in
    25 yds -0.10 in 2946 fps 1927 fpe 0.025 sec 0.12 in -0.57 in 0.04 in
    50 yds 1.05 in 2893 fps 1858 fpe 0.051 sec 0.49 in -0.47 in 0.14 in
    75 yds 1.94 in 2840 fps 1791 fpe 0.077 sec 1.12 in -0.31 in 0.35 in
    100 yds 2.56 in 2788 fps 1725 fpe 0.104 sec 2.03 in -0.08 in 0.66 in
    125 yds 2.89 in 2736 fps 1662 fpe 0.131 sec 3.21 in 0.23 in 1.05 in
    150 yds 2.94 in 2685 fps 1601 fpe 0.159 sec 4.69 in 0.62 in 1.54 in
    175 yds 2.68 in 2635 fps 1542 fpe 0.187 sec 6.47 in 1.10 in 2.11 in
    200 yds 2.12 in 2585 fps 1484 fpe 0.216 sec 8.55 in 1.66 in 2.76 in
    225 yds 1.23 in 2536 fps 1428 fpe 0.245 sec 10.95 in 2.31 in 3.50 in
    250 yds 0.00 in 2487 fps 1374 fpe 0.275 sec 13.71 in 3.07 in 4.37 in
    275 yds -1.54 in 2439 fps 1321 fpe 0.305 sec 16.77 in 3.92 in 5.27 in
    300 yds -3.47 in 2391 fps 1270 fpe 0.336 sec 20.22 in 4.88 in 6.32 in
    325 yds -5.79 in 2344 fps 1220 fpe 0.368 sec 24.06 in 5.97 in 7.49 in
    350 yds -8.52 in 2298 fps 1172 fpe 0.400 sec 28.31 in 7.18 in 8.80 in
    375 yds -11.67 in 2252 fps 1126 fpe 0.433 sec 32.98 in 8.52 in 10.23 in
    400 yds -15.25 in 2206 fps 1081 fpe 0.467 sec 38.09 in 10.00 in 11.78 in
    425 yds -19.28 in 2161 fps 1037 fpe 0.501 sec 43.63 in 11.62 in 13.45 in
    450 yds -23.76 in 2117 fps 995 fpe 0.537 sec 49.63 in 13.39 in 15.23 in
    475 yds -28.70 in 2073 fps 954 fpe 0.572 sec 56.10 in 15.32 in 17.12 in
    500 yds -34.11 in 2029 fps 914 fpe 0.609 sec 63.03 in 17.40 in 19.12 in
    525 yds -40.17 in 1987 fps 876 fpe 0.646 sec 70.60 in 19.70 in 21.34 in
    550 yds -46.51 in 1944 fps 839 fpe 0.684 sec 78.47 in 22.11 in 23.52 in
    575 yds -53.52 in 1902 fps 803 fpe 0.722 sec 87.00 in 24.75 in 25.91 in
    600 yds -61.21 in 1860 fps 768 fpe 0.762 sec 96.22 in 27.62 in 28.52 in
    625 yds -69.61 in 1820 fps 735 fpe 0.803 sec 106.13 in 30.73 in 31.32 in
    650 yds -78.71 in 1780 fps 703 fpe 0.845 sec 116.75 in 34.10 in 34.31 in
    675 yds -88.54 in 1741 fps 673 fpe 0.888 sec 128.10 in 37.72 in 37.49 in
    700 yds -99.10 in 1703 fps 644 fpe 0.932 sec 140.19 in 41.61 in 40.83 in
    725 yds -110.41 in 1665 fps 615 fpe 0.977 sec 153.02 in 45.78 in 44.33 in
    750 yds -122.48 in 1628 fps 588 fpe 1.023 sec 166.61 in 50.22 in 47.98 in
    775 yds -135.31 in 1591 fps 562 fpe 1.069 sec 180.96 in 54.96 in 51.78 in
    800 yds -148.91 in 1555 fps 537 fpe 1.117 sec 196.08 in 59.99 in 55.72 in
     
    Last edited: May 4, 2008
  10. Midas

    Midas Chief Troll B' Gone Forum Contributor

    100 yards is usually my standard for sighting in rifles, however, 50 yards will work, if a 100 yard range is not available.
     
  11. SwedeSteve

    SwedeSteve Freedom Zealot Forum Contributor

  12. Troy

    Troy G&G Enthusiast

    same, i've always sighted in at 100 yards.
     
  13. I'd sight in at 100 yards. Later you can find a place where you can try the gun out to whatever maximum range you'd like to try. You need to learn your limit then make the effort to always hunt within that limit. If I could not shoot a group under say 5 inches at 200 yards why do I need to worry where my gun might shoot at 300 yards.
     
  14. Calaper , nice gun, that 243 is a good small to medium size game round, I have seen alot of deer and Caribou taken with it.