Thread: Shimming scope...

Originally Posted by davetapson

Basically so I can shoot on the NZDA 100yd range.

Being a city dweller, I don't have the option of choosing my target distance unfortunately, and I have no farming buddies within easy reach for an afternoon's plinking.

I want to practice hunting shooting stances and can't do this on the 25m range and don't particularly want to do it all in .308 on the 100yd range.

Maybe what I should do is zero it at the 25yd range and then just set up two targets at 100yd - one to aim at, and one at point of impact. After all, all you are really looking for is grouping size.

Maybe just put a bright point of some kind on the top of the target frame (1" orange sticker?) to aim at and a target at an appropriate distance below that to catch the bullet strike?

Save me bending my scope for no good reason.

Thanks for asking the question.

Fair enough. If you are looking to practise so when you use your 308 at 100m you will be a better shot, then you can use the 22 at 50 and use smaller targets.

The travel time is determined by velocity and handily enough the 22LR supersonic are usually around 1300-1400fps and centrefire is usually around the 2600-2800fps whch is about double. As a basic rule of thumb, if you want to practise centrefire and use a 22 practise at half the distance. there are other factors that come into play but as a simple start it works.....22LR at 100 does have an issue with groups as it goes transonic before then and the wobble from that can screw groups up. Subs or target ammo is better for that but being subsonic to start with the drop is horrendous at 100m.I also shot 100m at the NZHA with a 22LR but found aiming at much smaller targets and setting up for 50m gave a better result after practising. (Even allowing for the distance.)
@mudgripz could be worth a chat to as he is well versed in the fine art of 22LR.....