Which good quality scope rings are best for a scope with parallax adjustment ?


Most rifle scopes have the parallax set for 100 yards but there are an increasing number of airgun specific scopes on the market that have the parallax set to 30 yards as 100 yards is too far for most airgun shooters. The parallax error shows itself as the crosshairs moving as your head moves but this is actually an optical illusion. Obviously this is not good for accuracy so the ideal situation is to choose a rifle scope with adjustable parallax. Some scopes will parallax down to a minimum of 50 yards as this is ideal for rimfire or centrefire rifle use but this is too far for most airguns so consider the range of adjustment prior to purchasing your scope. The adjustment on a rifle scope such as the popular Hawke Optics 25mm (1”) and 30mm models will be either on the objective lens or on a separate turret opposite the windage adjustment turret at the centre of the scope. Scopes with the adjustment on the objective lens are often known as AO (adjustable objective) but what is actually happening by adjusting the objective lens is that you are adjusting the parallax. If you decide to purchase a rifle scope with an AO you will need to be aware that the overall diameter of the objective lens will be more than a non AO scope so in turn you may need to use higher scope rings or ring mounts when mounting this type of scope. Otherwise the objective lens of the scope may foul the barrel of your rifle especially if you have an angled or adjustable scope mounting system fitted. If you choose a scope with a side (turret mounted) parallax adjustment wheel then lower ring mounts may be used. Better quality scopes tend to use the side parallax system and have a 30mm body tube instead of a 25mm (1”) but be carefull as this type of scope maybe excellent quality but the saddles are often larger than standard scopes. This needs to be considered when a one piece or extended mount is used as the large saddle may foul the base of the ring mount.


In hunting situations it is not always possible to adjust the parallax of your scope to the exact distance you are shooting at unlike if target shooting is your thing. This should not cause a problem at short to medium ranges but it could at long range especially if you are shooting at small targets. During this type of shooting you may have a little more time to set the scope to the required range (parallax setting) and ensure the rifle is not canted etc.