If I've only got 100 yards?????
- Thread starter JDMAG
- Start date
- Nov 4, 2004
- 25,604
- 9,782
JDMAG,
Try this-
http://www.biggameinfo.com/BalCalcAdv.aspx
You will need to know your MV to get accurate data.
JD338
Try this-
http://www.biggameinfo.com/BalCalcAdv.aspx
You will need to know your MV to get accurate data.
JD338
Big Squeeze
Handloader
- May 29, 2007
- 828
- 0
.......................You can also use the external ballistics calculator on the Hornady website and type in the proper info.JDMAG":2reb135q said:
You need to know your bullet`s MV and your bullet`s BC to type in. You also type in your desired yardage for a zero whether it be 100, 200 or 300 yards. Compare the trajectories between the zero yardages.
The calculator will give the flight trajectory of your bullet in 50 and 100 yard increments. It is alot of fun to play with.
My 300 WSM, regardless of reload, terrain, shooting distance, game hunted, is always sighted in at a 300 yard zero. Doing a 300 zero, eliminates more guesswork in cross hair hold-over and hold-under, even out to 350-400 yards. You will still need to know your trajectory #`s though!
Have fun!!!
G
Guest
Guest
You can also use the ballistic calculator at this link:
http://www.realguns.com/calc/exteriorballistics
This calculator is pretty accurate as far as my experience. You'll want to check your point of impact at the various distances you'll be shooting, because ballistic calculators are only estimations, and sometimes are well off the mark in terms of bullet drop.
One other feature of this calculator is the ability to find your combination's maximum Point Blank Range. This is the best trajectory figure for your rifle/load combination which will allow you the maximum distance to 'hold dead on' and still be within the vitals. You just pick the target circle size and set up your load parameters, and it will tell you what the MaxPBR is. I use 5" for white-tails, because the vitals are generally 8-10", so a 5" target circle allows me to shoot 3-5" groups and still be inside the vitals on deer. The calculator will then figure the trajectory that puts your bullet at a max of 2.5" above and below the line of sight, and spit out the distance and zero information about that trajectory.
A good example is my 8x57 700 Classic. I shoot a 180gr Ballistic Tip in this gun and generate 2723fps muzzle velocity. Plugging that information in gives a 246yd point blank range, and a zero of 210yds. What this tells me is that if I zero the rifle to be dead on at 210 (which is the same as 2.4 high at 100, and .5 high at 200) out to about 250yds I can hold right on the center of the vitals and be well within them with my shot placement. My 270Wby, on the other hand, launching a 130gr bullet at 3350fps gives me a point blank range of 308yds, with a zero of 263yds (which is significantly more reach than the 8x57, obviously). The 270Wby will be 2" high at 100 and 200yds to get this trajectory. This is the most useful tool I know of in terms of maximizing each rifle's trajectory, rather than picking an arbitrary number like 200 or 300yds.
http://www.realguns.com/calc/exteriorballistics
This calculator is pretty accurate as far as my experience. You'll want to check your point of impact at the various distances you'll be shooting, because ballistic calculators are only estimations, and sometimes are well off the mark in terms of bullet drop.
One other feature of this calculator is the ability to find your combination's maximum Point Blank Range. This is the best trajectory figure for your rifle/load combination which will allow you the maximum distance to 'hold dead on' and still be within the vitals. You just pick the target circle size and set up your load parameters, and it will tell you what the MaxPBR is. I use 5" for white-tails, because the vitals are generally 8-10", so a 5" target circle allows me to shoot 3-5" groups and still be inside the vitals on deer. The calculator will then figure the trajectory that puts your bullet at a max of 2.5" above and below the line of sight, and spit out the distance and zero information about that trajectory.
A good example is my 8x57 700 Classic. I shoot a 180gr Ballistic Tip in this gun and generate 2723fps muzzle velocity. Plugging that information in gives a 246yd point blank range, and a zero of 210yds. What this tells me is that if I zero the rifle to be dead on at 210 (which is the same as 2.4 high at 100, and .5 high at 200) out to about 250yds I can hold right on the center of the vitals and be well within them with my shot placement. My 270Wby, on the other hand, launching a 130gr bullet at 3350fps gives me a point blank range of 308yds, with a zero of 263yds (which is significantly more reach than the 8x57, obviously). The 270Wby will be 2" high at 100 and 200yds to get this trajectory. This is the most useful tool I know of in terms of maximizing each rifle's trajectory, rather than picking an arbitrary number like 200 or 300yds.
- Oct 30, 2004
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