HikMicro Alpex 4K - Is there BC Database?

[LuvMyDatto]

Hi All,

I am returning to shooting for the first time since you could still buy a .22 at KMart.

A lot has changed since then!

We own a small farm in Central Vic and have used a local knackery for humane euthanasia of sick or injured horses and cattle, but they unfortunately shut down last year, so I set about getting a gun licence, for the unfortunate occasions when humane euthanasia is the best outcome. My wife is a vet which helps with the ethics etc.

Long story short, I have ended up with a .22lr and .22WMR and a Hikmicro 4K Alpex with a Speras TH4 LED IR Illuminator.

Hoping to add a .223 and a.308 to the gun safe at some stage.

I love the Alpex day/night scope and it has helped drop rabbit numbers a little already. Being able to shoot at night without annoying the neighbours with a white spotlight is excellent. The only drawback is finding BC info for ammunition. I have tried using the search function here, so apologies if this has been done to death.

I would be grateful for any thoughts, info and insight anyone would like to share on these scopes and ballistics.

I am really enjoying the available training etc for hunting and whatnot through various sporting and govt bodies. What a pleasant surprise. The stereotype of gun users I had is way off the mark.

I'd also like to learn about deer stalking and hunting but I guess I'll try to find the correct threads for that.

Thanks!

[bladeracer]

I don't use electronic scopes so am not sure precisely what you want to know.
WMR is easy as I think most manufacturers list their BC's - https://www.hornady.com/ammunition/rimfire/22-wmr-30-gr-v-max#!/

For .22LR 40gn bullets I'm using .135.
But the best way is to work it out for yourself, with your rifle, your ammunition, in your environment. It does require a reasonably accurate rifle and fairly consistent ammunition though.

You can measure bullet drop and/or velocity then put your numbers into a ballistic calculator and tweak the BC until you generate a curve that matches your real-world numbers.
https://shooterscalculator.com/ballistic-trajectory-chart.php?pl=%5BPreset+Name%5D&presets=&df=G1&bc=0.135&bw=40&vi=1070&zr=110&sh=3.145&sa=0&ws=10&wa=90&ssb=on&cr=550&ss=1&chartColumns=Range~m%60Elevation~cm%60Elevation~MOA~FBFFF5%60Windage~cm%60Windage~MOA~FBFFF5%60Time~s%60Energy~ft.lbf%60Vel%5Bx%2By%5D~ft%2Fs&lbl=&submitst=+Create+Graph+

Shoot some groups off the bench (maximum accuracy) at an accurately-measured 50m, 100m and 150m, all aimed at the same point on the target (don't holdover - with .22LR you might have 750mm of drop at 150m from a 50m zero so use a large target board). Measure each individual bullet hole's height above or below your aiming mark (draw a level line through the aiming mark after you set up your target), and average them to find the mean drop at each distance. The more holes you have the more useful the data will be, especially at the longer distances, but discard any obvious fliers as they'll skew the average.

You can do the same using a chronograph firing groups at the same distances and averaging the velocities at each distance to tell you how quickly the bullet is dumping velocity. Put a steel plate in front of the chronograph at the longer distances if you don't want to shoot it.

You don't want too much wind during testing as it will also skew your results.

Hi All,

I am returning to shooting for the first time since you could still buy a .22 at KMart.

A lot has changed since then!

We own a small farm in Central Vic and have used a local knackery for humane euthanasia of sick or injured horses and cattle, but they unfortunately shut down last year, so I set about getting a gun licence, for the unfortunate occasions when humane euthanasia is the best outcome. My wife is a vet which helps with the ethics etc.

Long story short, I have ended up with a .22lr and .22WMR and a Hikmicro 4K Alpex with a Speras TH4 LED IR Illuminator.

Hoping to add a .223 and a.308 to the gun safe at some stage.

I love the Alpex day/night scope and it has helped drop rabbit numbers a little already. Being able to shoot at night without annoying the neighbours with a white spotlight is excellent. The only drawback is finding BC info for ammunition. I have tried using the search function here, so apologies if this has been done to death.

I would be grateful for any thoughts, info and insight anyone would like to share on these scopes and ballistics.

I am really enjoying the available training etc for hunting and whatnot through various sporting and govt bodies. What a pleasant surprise. The stereotype of gun users I had is way off the mark.

I'd also like to learn about deer stalking and hunting but I guess I'll try to find the correct threads for that.

Thanks!

[deye243]

.125 in the scope for most 40g cci loads work in mine out to 250y