zrexpilot

100 yd zero usually results in about 1.5 to 2 inches low at 25 yds,depending on scope height.
to move up 2 inches at 25 yds requires roughly an 8 inch moa bump up. so yes a 25 yd zero can be around 8 inches high at 100 yds if he shot 1 inch high at 25 yds he would be 12 inches high at 100yds the higher the scope the worse these numbers will be

Topgun 3006

Baloney---Please show me the table(s) for any caliber where you got those numbers for any normal setup! Between 25 yards and 100 yards there is only a couple inch difference, at most, in trajectory for most calibers and it's normally on the + side and not - as you are saying, just like the article in the link below shows along with charts to show what we are stating!


http://www.chuckhawks.com/bullet_trajectory.htm

skb2706

This makes no sense....

Topgun 3006

Quote:
Originally Posted by zrexpilot
100 yd zero usually results in about 1.5 to 2 inches low at 25 yds,depending on scope height.
to move up 2 inches at 25 yds requires roughly an 8 inch moa bump up. so yes a 25 yd zero can be around 8 inches high at 100 yds if he shot 1 inch high at 25 yds he would be 12 inches high at 100yds the higher the scope the worse these numbers will be

This makes no sense....


Bingo! That's about as screwed up a post regarding bullet trajectory and a scope as I've ever read anywhere. I hope he reads and looks at the charts in the link I just posted! One of the charts shows a typical 30-06 bullet about +1" at 25 yards, than it's at +3" at 100 yards, and -3" at about 210 yards. That would be a good sightin for someone hunting where the longest shots aren't more than that distance. Most guys hunting out west will zero their gun at 200 yards so that the MPBR is over 300 yards for the longer shooting expected out there in the more open country. My .243, 25-06, and both 30-06s I take out to Wyoming are zeroed at 200 yards, while the 30-06 03A3 that I use in northern Michigan where the shots are close is zeroed at 100 yards.

zrexpilot

i dont care what charts say, just try it, 100 yd sight in and your gun will shoot exactly what your scope height is low, at 25 yds. its called line of sight.
moa at 25 yds is 4 times what it is at 100 yds. to get a gun shooting 2 inches low at 25 yds zeroed , requires 4 times the amount of clicks in the scope as it does at 100 yds.

Topgun 3006

The chart shows, not states, no such thing as charts don't talk! The chart shows a person sighting in a 30-06 with a typical hunting bullet AT 170 Yards so it is approximately 3" high at 100 yards and that results in approximately a 3" drop at 210 yards in the illustration. Looking at the trajectory of the bullet it is approximately +1" at the 25 yard marker on it's way to that 170 yard zero. That is what many call the MPBR (Maximum Point Blank Range) where you could shoot at an animal at any distance from the muzzle out to 210 yards and not be more than +/- 3" from where the crosshairs are aimed. In other words it would always be within a 6" circle, which is generally less than the vital zone of big game. Now these expensive scopes with adjustable turrets have built in compensation for long range shooting and can be/are made for a particular load so that the crosshairs can be held right on the target at whatever distance is dialed into the elevation turret. The same thing is done if one has a windage turret to compensate for bullet drift. The scope crosshairs may be on the target, but the barrel is pointing up from the horizontal position and to the right/left of the target depending on the wind. If a barrel is held in a horizontal position, a bullet starts a downward path as soon as it leaves the barrel and it never goes above the axis of the barrel. Obviously that is why the barrel must be elevated to a higher and higher angle/position from horizontal in order for the bullet to be on target as distance to the target increases.

zrexpilot---4 clicks at 25 yards is normally 1/4" of movement on most scopes and for every 25 yard increase in distance it will take one less click, such that at 100 yards it would only take 1 click to move the bullet 1/4". I'm not disputing that.

Champlain Islander

Huh????I guess I must have a "foreign scope". All my scopes are 1 click moves 1/4" at 100 yds. Moving 4 clicks at 25 yds would probably only move it 1/4"

pyclub1

Champlain, Nope your scope isn't foreign, or maybe it is and all mine are as well. Both Nikon's, my redfield and leupolds are all 1 click 1/4" move as well. I laughed my ass off reading the posts.. 8 deer in a row, 10 deer in a row. WOW. Time to start watching deer out of the tree practicing drawing on them and putting the pin behind the shoulder and just holding it there and not shooting will help a ton. Also, with a rifle?? With a rifle that's got a scope??????? I get as pumped up as the next guy when a shooter buck walks into my life but holy smokes guys... Spend less time on the couch watching hunting shows and spend more time on the range and targets.... Sounds like you made a clean kill on that deer. Whatever you did, keep doing it and practice practice practice. Then get in the woods and watch deer and do what I said about getting them in range and not worrying about harvesting them, get drawn on them and just put the pin behind the shoulder and hold it there. It will help you shoot better, strengthen your muscles, make you better at not being spotted and most importantly it will make you concentrate on your pin/crosshairs and not the whole deer. Pick a spot. Aim small miss small.... Hope your new streak has 8 in a row on the ground with a tag on them...

Topgun 3006

After reading the previous posts, I see that I left out the /4 in regards to clicks in my post. I was in a hurry to go eat lunch and I just went in and edited it to what it should have been, as we are all on the same page! Sorry for the typo causing the confusion!

zrexpilot

exactly what i said. i dont know why you all cant understand
lets say a gun zeroed at 100 yds and has a 2 inch scope height hits 2 inches low at 25 yds ok, now how many clicks would it take to zero that gun at 25 yds ? 4 per 1/4 inch right ? so it would take 32 clicks to come up 2 inches at 25 yds thats 8 moa up at 25 yds so now shoot the gun at 100 yds and you will 8 inches high.
we were already zero at 100 and we just bumped the scope 8 inches up just to be zero at 25 yds, get it ?