Please help!

If you are not dealing with wind drift, the your problem lies with either the scope (parallax) or with the mounts (not parallel with the bore). There are cures for both.
 
Would help to know exact location of groups at each distance.

Sounds like either wind drift or, more likely, it's slightly though barely noticeably left at 100, twice as much and now very noticeable at 200 and 50% again that much at 300.
 
It's in the detaiils

I'll ask a stupid question...is the scope canted, either in the rings or the rifle by you when you shoot?
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Not so stupid as first, deal with the practicals before going to the particulars. This would be my first call. Your bullet is tracking the reticles. If canted or clocking, it will always show more at long ranges. .... :rolleyes:


Be Safe !!!
 
The rifle is not shooting to the left beyond 100 yards, the rifle ALWAYS shoots to the left. But in sighting in the rifle, the OP adjusted the scope to compensate for the left shooting at 100 yards. But as the range increases, the leftward shooting again becomes evident. A very common situation. Now the problem is to find the problem!! It could be in the scope, the scope mounts, the holes in the receiver, the barrel, the bedding, etc.

A good place to start is to center the scope. Click the crosshairs all the way in one direction. Then all the way back, counting the clicks. Then divide that count by two and bring the scope back that number of clicks. The scope will now be centered. Shoot a group and see what happens. Take it from there.

Jim
 
As far as I can tell, the scope isnt canted any, but I did buy some cheap rings and bases, but the problem started before I changed anything. I shot a gallon jug at 300 yards a while back, and I aimed about 5 inches to the right, and hit center of the jug. I have tried shooting it at different scope powers, and its all the same. With my loads, I am usually shooting about a 3 inch group at 300 yards, and they are all left. I ended up sighting it in a little to the right at 100 yards so it wouldnt be so far left at further distances, but I would like for it to all be center. I believe I will get me a new scope and see if thats the problem. Thanks again guys for all the advice:)
 
Well that DOES change things. If you're right of center at 100 it should be impossible, except for wind, to be left at 300 (or any other distance).

The bullet can't be headed right for the first 100 yards and turn left later.

It's got to be either parallax or a scope problem.

The most confusing part to me is that I wouldn't expect either of those things to be consistent.

If the scope was broken I would expect it to be all over.

If its parallax, it would change every time you held your head a little different.
 
Yeah, but the would be virtually impossible at 100 and 300 yards. A scope so far out of line to be right at 100 and left at 300 would be off by.... miles. I mean, it has to START farther out of line than it is right at 100.

Say it's an inch right at 100. It would have to be an inch off center to STAY an inch off at 300. If its actually shooting right to left, it would have to be over an inch off center at the gun.

25 and 100 is one thing. Much less obvious. 100 and 300, you'd need custom mounts to make it work.

As an example, if my geometry is right, if it's 1/2" right at 100 and 1/2" left at 300, the track is 1/2" left every 100 yards. The scope would have to be an INCH off center on the gun.
 
I would say that it's either wind drift or you aren't exactly zeroed. the longer a bullet has to travel with a crosswind the more it drifts. the slower it travels the more it is susceptable to wind so it will drift more between 200 and 300 than it will between 100 and 200.

being off buy half an inch at 100 yards is not bad at all, it is well within MOA and many shooters don't even feel the need to adjust for such a minute difference however that half inch at 100 yards becomes a full inch left and an inch and a half at 300 etc etc.

then there is the possibility of a combination of the two where it is slightly off zero at 100 yards but as the bullet slows down the wind grabs it and that minute miscalculation becomes even more problematic.
 
I have to disagree with some of these thoughts. We shot out to 500 yards and we had different windage and elevation settings for 200, 300(Sometimes) and 500 yards on calm days. A bullet has its own "whip" to it just like an arrow. Changing bullet style may influence this. Using 3 brands of ammo with the same bullet weight may give you tight patterns, but usually up, down, right, left.
 
Gunplummer, come to think about it, this all started when I changed from sierra bullets to those v-max bullets. I could no longer find those sierras, so I went with v-max, and I have had the hardest time working up an accurate load with them. I started out with the 55 grain, and my gun DID NOT like those at all, and I have found a so-so load with the 50 grain v-max bullets. I know it sounds kinda crazy, but do you guys think that has anything to do with it? That thought never even crossed my mind, but thats when it all started!
 
I was shooting 55 grain spitzer boat tails. I got my most accurate loads out of those bullets, and no one around here carries them anymore.
 
I've had excellent accuracy out of the SBTs in my .270 also. I just order them on line.

By the way, VMAX are flat based correct?
 
Striker, It depends on which grain you go with. If I remember right, the 55 grain are flat based, and the 50 grain are the boattails, and a few others are boattails also.
 
going with a different bullet would explain a lot. just a thousandth of an inch difference in diameter, 5 grains difference in weight or just a difference in bullet construction can change bullet path. I shot remington coreloks out of my 243 for years and was always accused of having a flinch because I could not hit what I was aiming at, one day on a whim I bought federal powershoks and inside of half that box I had my rifle zeroed and the very next bullet got me my first deer. some guns just do not like certain ammo.
 
The geometry does not lie. The scope line-of-sight--whether internal or external--is physically offset
to the left of the bore, and its axis corrected back to the right by ~2moa to converge at 100yd.
But beyond that, things diverge -- and keep diverging -- by that same 2moa
 
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mehavey's explanation is probably spot on. Don't bother asking whether the bullet is flat based or boat tailed, within 300 yards/metres it hardly makes a difference, certainly not inches of difference.

What rings are on the rifle? Change them out, alternatively just take the gun to a smith
 
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