Post by: Slideshow86 on February 14, 2010, 05:27:13 PM
-Sight in, on rest dead on center at 100 yards, Depending on caliber you aim "x" amount hight at 200 yards or "x" amount hight at 300yards.
Or you can try
-Sight in, on rest 3" high at 100 yards, Depending on your caliber your bulled will drop to a few inches high at 200yards and a few inches low at 300 yards.
The first way you will need to estimate how many yards it is and how high you need to aim. Aiming too high and miss judging distance results in a miss.
With the second way you just point aim and shoot (if 300 yards or closer). With this way, all hits are in the kill zone (depending on caliber)
What do you guys do?
My scope has BDC So I will be sighting in to use that and a range finder but I was very interested as a range finder isnt always available and estimating yardage is difficult.
Post by: rasbo on February 14, 2010, 05:30:11 PM
Post by: bonecrusher on February 14, 2010, 05:30:26 PM
Post by: wrangler on February 14, 2010, 05:49:12 PM
Post by: Jerry malbeck on February 14, 2010, 06:10:11 PM
If you use a ballistic calculator knowing your
ballistic coefficient
bullet weight
height of scope above barrel
muzzle velocity
altitude and temp
you can run a point blank range calculation and find the best zero for that caliber and bullet weight.
here is a example
223 with 52 gr. h.p. velocity 3250 . max point blank range is 297 yrds when zeroed @ 257 yrds.
this will put you no more then -1.2@ 25 yrds to - 5.5 inches@ 300 yrds.
that is how i zero my coyote rigs , when you do it this way you can hold fur from 25 to 300 yrds and make a connecting shot .
Post by: Galpster on February 14, 2010, 06:18:58 PM
Post by: Woodchuck on February 14, 2010, 06:29:22 PM
Post by: Bofire on February 14, 2010, 07:25:16 PM
and he is correct again.
Carl
Post by: MikeWalking on February 14, 2010, 07:46:03 PM
Quote
when zeroed @ 257 yrds.
Zeroed at 257 yards, is that what you meant to say? I've zeroed several M16's at 25m and had about 5in drop at 300...
All the rifles I've had, except the .22LR's, have been zeroed to hit 2-3in high at 100yds.
Post by: Jerry malbeck on February 14, 2010, 10:14:27 PM
that IS what i said LOL. If you read my post it says youll be 5.5 inches low at 300 yrds.
you can get pretty much the same effect if you zero @ 50 with a 223.
Hold overs are a guessing game and that is one game i really suck at .
That is my reason for sighting for MPB range .
whever i tried to hold over i usually missed , its way to hard for me to judge range
( I really suck at that) and when i sight a gun in at 2 to 3 inches high at 100 i end up missing as most of my coyotes are taken at 50 or less. ( tight ground i guess)
Here are the numbers for the MPBR I posted above , youll see why i favor it as your always going to hit fur
Yards Path
25 -1.2
50 -0.1
75 0.8
100 1.4
125 1.8
150 1.8 not a misprint
175 1.6
200 1.0
225 0.0
250 -1.4
275 -3.2
300 -5.5 effective max range of a 223 in my oppinion .
MPBR is 297 sighted @ 257 i sighted @ 225 for my needs .
Hope this makes it easier to understand , Jerry .
I guess i should have added , I think in all my years of calling i can only remember shooting 2 coyotes past 100 yrds , so i dont really have allot of exp. with 300 yrd stuff.
Carl , I dont know everything , Yet , still trying to figure out my wife , she is kinda like a coyote , just when i figure i know it all she changes the rules . ;)
Post by: shaneman153D on February 14, 2010, 11:26:08 PM
The program is also pretty good at calculating drop if you use target turrets and a range card. I suck at holdover so I do the turret thing.
Also, if you're limited to 100yds at your shooting range, you can determine how high at 100 you should be for that MPB range. I always zero to this number first, then take the long walk to verify.
Post by: Caseyd on February 15, 2010, 12:17:07 AM
Post by: MikeWalking on February 15, 2010, 09:33:56 AM
Quote
when zeroed @ 257 yrds.
For a sec there I had an image of you pacing off 257 yards to set up your target. Which after a nights sleep following a 16hr shift now doesn't sound so odd... :P
Post by: Jerry malbeck on February 15, 2010, 02:40:44 PM
Post by: Intruder on February 15, 2010, 03:12:33 PM
The concept allows you to achieve the most performance out of your gun/round without having to compensate... hold high or low. Most big game formulas try to achieve a + or - 3" variance. Meaning out to a certain range, if you are aiming dead on, the bullet will not hit higher or lower than 3".
For example... say a 300 mag shooting a 180 bullet at 3000 fps. Max point blank range will be about 290 yards when the gun is zeroed in dead on at 250. Translation... any shot between 0 and 290, just aim and shoot. No need to worry about hold over etc. At 100 yard you'd be hitting about 2.5" high.
Here's a nifty trick to allow you even more versatility. Assuming you're already sighted in to achieve max point blank range and you use a standard heavy duplex scope. You actually have a "long range" sight point on the bottom of the vertical cross hair where it goes from thick to thin. Just do some messin around at the range to determine yardage where that point shoots and you'll be set using you standard crosshair out to max point blank and then the other point for longer shots. Obviously scopes w/ multipe aim points you can do this for each. I'd still dial in on max point blank for the regular crosshairs though.
Post by: carpsniperg2 on February 15, 2010, 03:41:44 PM
Post by: Slideshow86 on February 15, 2010, 08:11:48 PM
Now I need to figure out my Max point blank range and sight my rifle in using the BDC circles my scope has.
Post by: Jerry malbeck on February 15, 2010, 10:17:54 PM
Post by: Pathfinder101 on February 15, 2010, 10:24:25 PM
A lot of this is just knowing and shooting your gun enough to know where it hits. :twocents:
Post by: jasnt on February 16, 2010, 12:33:29 PM
i sight in acording to there recomendations. works well for me
Post by: Intruder on February 16, 2010, 01:41:24 PM
alot of info on here, most my guns are 1/2-1" high at 100 some of my flater shooting guns are dead on at 100.
First... let me say that a guy has to do what he has confidence in and what he's comfortable with.... no right or wrong. But just for the sake of argument lets use your flat shooting example sighted in at 100 vs max point.
Assumptions: 300 mag, 180 grn w/ high BC bullet, 3250 fps..... pretty flat shooting round.
- sighted in dead on at 100 it'd be 3.5" low at around 225 yards... meaning you'd have to start compesating for hold over around 220 give or take. It'd be 11" low at 320.
- sighted in at max point blank, it'd be dead on at 275 and you could shoot out to about 320 yards without compensating. It'd be 11" low at 405.
Sighting in to max point blank allows ya to take full potential out of a gun. The flatter shooting the bigger effect.
Post by: Shootmoore on February 16, 2010, 02:01:59 PM
I sight my AR and CAR's iron sights in @50yds dead nuts. Also easier for me to do the math in my head from 5 yds to 250yds.
Is it the best way? :dunno: But it works for how my mind works I guess. I would suggest that you do it the same with any scopes and any iron sights as you don't have to remember which one is which (ie now is this gun 1" @100 or 2" @100. Other than that what works for you is what I would do.
Shootmoore
Post by: dontgetcrabs on February 16, 2010, 02:27:22 PM
Post by: Lowedog on February 16, 2010, 03:01:54 PM
http://www.handloads.com/calc/ (http://www.handloads.com/calc/)
Post by: Pathfinder101 on February 16, 2010, 03:06:01 PM
I am going to try this out next time I am at the range.
Pretty cool, thanks... :tup:
Post by: VarmintVentilator on February 17, 2010, 11:38:39 AM