Greetings,
I suggest you repeat the test with a better aiming mark. A hollow square or circle that you can quarter with your cross hairs will work a lot better. Also consider zeroing at 200 metres.
Regards Grandpamac,
Was your Zero bang on to start with ?
"Hunting and fishing" fucking over licenced firearms owners since ages ago.
308Win One chambering to rule them all.
or put your cross at 45 degrees for same reasons as previous two suggestions.
75/15/10 black powder matters
Both variations in the ammo and the shooter.
Could it be parallex related?
Hunt safe, look after the bush & plug more pests. The greatest invention in the history of man is beer.
https://youtu.be/2v3QrUvYj-Y
typically vertical dispersion is inconsistency in how you control the recoil ie holding tightness inconsistency grip/or butt pressure ect
horizontal dispersion is grip and not lining up directly behind the rifle
thats pretty good shooting regardless so it could just be adjusting between rifles
if you want to get really serious about it get someone to film you shooting then you can really pick apart what you are doing
Well within 1 minute of deer , get out and shoot something for the pot
At 300m you do start to see minor wind effect the groups. Have a look at 'Applied Ballistics' and deliberately dial in a 10m/sec crosswind.
You'll see a couple of clicks to account for. 0.2milrads at 100m is 2cm, so that is 6cm drift at 300m (plus or minus one for height depending on direction).
Anything minor adds up too but if it were me i would leave the scope as is but really make sure that crosshair doesn't move independently to the target when you support the rifle / hands off / no cheek weld etc and bob your head slightly when looking through the scope. I do this every time (when you know you can risk taking the time). Bad parallax will definitely amplify any changes coming from your body position (that the terrain might be causing). Especially if your elbows aren't level....
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