not necessarily, if you zero at 100 you could have a secondary zero at 27 yards.
If your primary zero is at 27 yards then you have 8” drop at 100......
. 22lr zero range
- Thread starter Crowstalker
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If your primary zero is at 27 yards then you have 8” drop at 100......
Is this with subs
StephenToast
Well-Known Member
50 Yds. I use Eley HP subsonics.
Very tight grouping at 50 but beyond 75 the groups open up too much for head shooting.
I don't stretch past 90.
I assume that the reason I can't achieve the accuracy some talk of at 100yds is because I only have a 12 inch barrel?
Very tight grouping at 50 but beyond 75 the groups open up too much for head shooting.
I don't stretch past 90.
I assume that the reason I can't achieve the accuracy some talk of at 100yds is because I only have a 12 inch barrel?
chrisstorey79
Well-Known Member
That's amazing performance
I'm using Gecco 40 grain semi-auto out of my cz 452 - which supposedly has a MV of 1150
I am zeroed for 70m but have to dial a further 8 or nine minutes just to go back the extra 30m to 100m (that's an 8 or 9 inch drop)
Am getting into this precision .22LR stuff as I have just built a training ground for simulating the Precision Rifle League, but with .22LR from 50m to 200m against a 3'' or 2" target
Same discipline as the big boys as we will use Kestral 5700 and applied ballistics to endeavour to achieve 'one shot one hit' in field conditions against time and over a range of barricades
Yup - I'm bored and have been sitting here these last few weeks dreaming up new challenges
Mountain Bug
Well-Known Member
Well, first off I must admit that I am wrong in my numbers but the principle is still correct. After using a ballistics calculator for the first time, I see that a 27 yard zero with my setup would have the bullet 1.4 inches low at 100 yards. However if I were to change my zero to 21 yards this would yield the desired secondary zero of 100 yards. I was given the original info from a reputable source and did not bother to prove it on paper which was my mistake. Unproven as it was, the results were still good....dead gophers and squirrels. They don't seem to care if the shot is not mathematically proven but still hits them. I think this has more to do with gaining a natural feel for the gun at various guessed distances and weather conditions. And, sometimes the first shot doesn't always find its mark but a compensated second shot usually does.
Above is the trajectory of a 27 yd zero and below is the 21 yd zero.
Scott
No, that’s a 100 yard primary zero which gives a secondary zero of 21 yards. But handy nonetheless.
brian Litz’s app has it 21 / 88 may explain your first round misses
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Mountain Bug
Well-Known Member
If you enter the same info into the program with a 21 yard zero or a 100 yard zero it results in the same trajectory vs line of sight. Is it relevant which one you call the primary zero?
Edit: The calculator that I used allows for environmental factors such as my altitude of 8000 ft, very low humidity, and the use of a "hyper" velocity cartridge along with a point of aim being higher than 1.5 inches above the barrel centerline. This may explain the difference between our findings.
Scott
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Any app will do it, you need an accurate height of centreline or scope to bore and cheonographed velocity
Pellet Pinger
Well-Known Member
12gsnapcaps
Well-Known Member
I zero at 50yards and then my second milldot it 80y and my third is 100y (with 42g subs). Anything past 100 and it's HMR time.
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