Thread: Show us ya rimfire bunny rigs

Right, so abit of an update. I sent the Stealth optic back and the shop swapped it for a Nikko Stirling Panamax 3-9 x 40 with adjustable Objective. Got it home, mounted it on the rifle and checked it against four vertical 2cm diameter Dots at 10cm apart on a target at 100m. The mil dot showed an error at 9x power that got gradually bigger the further out from the centre of the reticule you got. Nothing in the online instruction manual about the specs of the reticule or dimensions or at what power the graduations equalled 1 Mil. A quick email to Nikko Stirling...

Subject
Panamax 3-9 x 40 HMD Reticle
Message
Hi there, I am trying to find specific information about the HMD reticule in a Panama 3-9x40 AO. the online manuals are very generic - with no specific information covering technical details of the reticule. At what zoom is the reticule accurate at? i.e where the spacing between the MIL dots is equivalent to one MIL on the target? is it at maximum zoom? What are the dimensions of the dots, sub tensions etc.. In putting a series of 0.2Mil dots on the target vertically at 1 MIL intervals (10cm apart for range of 100m), even at max zoom, the dots on the target do not line up with the reticule dots when viewed from 100m

The first mil dot of the scope does with the corresponding dot on the target but from the 2nd dot on - an increasing error presents itself

Distances are lased with a Nikon Monarch 3000 Laser range finder, held directly above the position of the scope.

The target was levelled with a spirit level, and the dots on the target drawn out with parallel rules and a compass.

Any light or information you could shed on the matter would be greatly appreciated.

Thanks.

Reply back from Nikko Stirling

I have done some asking around and can give you the attached:

Please check attached HMD reticle drawing with dimensions.

It's set at 10x, means all of the dimensions are correct at 10x, even on 3-9x40 model.

If you want to use the reticle at others magnification except 10x, this is calculation:

current dimension = (dimension on drawing x 10) / (current magnification)

Kind Regards,


The formula had me scratching my head a little bit, not least of all from how it is worded. but I've been playing around with the ballistics app shooter and excel. I think I have figured out a conversion that works.

working in meters

Step a)

divide range to the target by 100 - this is the distance in cm of 1 mil on the target at that range.

Multiply this by 10, then divide by the zoom power. - I'm pretty certain this is how many mil dots you have to hold over to achieve 1 Mil difference on the target for that zoom power at that range

b)

Take the holdover required from the ballistics app of your choice for that range, and divide by the figure you got in a).

This gives you a corrected holdover for the mil reticule, for that zoom power, at that range.

It sounds complicated, however excel does all the hard work for you once you set it up and you can knock out a drop chart to stick to your rifle in no time, its also easy to adjust the inputs from the ballistic calculator if you need to.

I was getting consistent hits this afternoon on a 4 inch gong at 125m using subs and don't think I have found the limit of them yet.

I was shooting off a 15 dollar Ali express sandbag filled with kitty litter while using the rolled up gunbag as a rear rest.

Let me know if this helpful.