I have a ziess conquest and it has no parallax adjustment... can you explain why this is?
It's near-universal practice among scope makers to not include a parallax adjustment in hunting scopes. I've never seen it on a 9X or less scope, and I was also surprised to see it missing from a 4.5-14X Leupold varmint scope.
Without an adjustment for parallax, the scope maker gets to choose on distance at which the scope's parallax is zero; at any other distance there will be (positive or negative) parallax. Typically 200 yards is chosen to be parallax-free for scopes intended for centrefire rifles, 75 yards for scopes intended for shotguns (slugs), and 25 or something like that for rimfire scopes. These are chosen because they seem to be the "best compromise".
If you want to do precision shooting with a non-parallax-adjustable scope, there is a shooting technique that allows you keep the parallax exactly constant from shot to shot:
- change your scope or eye position so that the image you see in the eyepiece is smaller than the eyepiece. You can do this by either being "too close" to the eyepiece or "too far" from the eyepiece. Choosing "too far" is usually the best choice.
- hold your eye position such that the partial image you see in the eyepiece while you aim and shoot, is centred in the eyepiece (this ensures that your eye is always in the same position for each shot that you fire).
i shot 2, 3 shot groups of each weight at 100 yards. my shooting rest isn't very good i have one of those red plastic ones so results aren't always perfect...
OK. Take what you have shot so far being the best information you have so far. But as you shoot more groups with your rifle, that will help you refine your estimate of what size groups you are shooting at each distance or with each load.
You generally want to know what size of group you can typically expect, i.e. the size of an average group. Knowing the size of the smallest group you ever shot, while kinda fulfilling, isn't actually particularly useful information.