Author Topic: Blerk's Progress  (Read 45779 times)

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Offline Gambo

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Re: Blerk's Progress
« Reply #650 on: August 27, 2018, 11:46:45 AM »
"Looks a lot like a pellet hole ..........." he says to me.

Shoulda given him a sharp clip round the ear'ole n told him not to be so stupid. ;) ;D ;D

Online 21grains

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Re: Blerk's Progress
« Reply #651 on: August 27, 2018, 06:25:19 PM »
I'm the Best Stupid.....I stuck the Barrel Out the Window to Shoot a Rat in the Stone Wall at My Dad's House Bathroom Window.....But the Window was Shut.....Foolish Bastard I am.....Franky

Offline Gambo

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Re: Blerk's Progress
« Reply #652 on: August 27, 2018, 07:13:53 PM »
Drrrrrrrr........but big respect for admitting it Frankster. ;)

Offline IceBlerk

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Re: Blerk's Progress
« Reply #653 on: August 28, 2018, 08:01:54 AM »
.......... the Window was Shut.......

I feel better now.
..........so I packed up and went to the pub.

Offline Gambo

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Re: Blerk's Progress
« Reply #654 on: August 29, 2018, 10:56:41 PM »
I feel better now.

Is 'better' accepting of that......and more importantly, what does Mrs Blerkster think about it? ???

Offline IceBlerk

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Re: Blerk's Progress
« Reply #655 on: August 30, 2018, 09:21:28 AM »
I feel better now.

Is 'better' accepting of that......and more importantly, what does Mrs Blerkster think about it? ???

I feel better because MY window was open!

And Mrs. Blerk still hasn't noticed/mentioned the wound in the car door. I think I've got away with it.

On a different subject ................ Baggy was asking about the zero on my rifle the other day after he had watched some of my ratting clips and that got me thinking. Let's say that a shooter zeros his scope/rifle at 25yards; how does he know that it's his FAR zero that's at 25yards and not the near zero? Could it be that he's actually got a near zero of 25yards and a far zero of (say) 75yards? And how would that be corrected? I was trying to work it out in my head last night and I was thinking that the corrective course of action would be to dial the vertical turret DOWN significantly but then I started thinking that perhaps it should be dialled UP.

Then my head started to hurt so I stopped thinking.
..........so I packed up and went to the pub.

Offline Baggawind

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Re: Blerk's Progress
« Reply #656 on: August 30, 2018, 04:09:17 PM »
It,s quite simple really Blerky. If you have zeroed your rifle at 25 yards then the pellet will leave the barrel below the crosshairs then cross over at roughly 10 yards , your secondary zero , then climb above the crosshairs before dropping back down to your primary zero ( 25 yards). I,m asuming your rifle is in .22 calibre.  Depending on how high the centreline of your scope is above the centreline of your barrel , you will have to aim slightly low at ranges between say, 12 and 20 yards and aim high at ranges below 10 yards . ( they,re the difficult ones ). These figures are just a rough guide ,it all depends on things like pellet type and weight , the power of the rifle and scope height. Place some cards out at five yard intervals from 10 yards to whatever you,re likely to shoot at and take a note of where the pellets strike. As you know, I use only .177 which with a 28 yard zero allows me to aim dead on at ranges between 12 and 35 yards. Feed all the relative information into Chairgun and you,ll have a better idea of what i,m babbling on about.

Offline IceBlerk

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Re: Blerk's Progress
« Reply #657 on: August 30, 2018, 05:02:47 PM »
Hi, Baggy.

Thanks for that, it confirms my understanding up to this point.

But, what my mind was/Is having trouble with is "What if the pellet climbs to a secondary zero at 25 yards? How would you adjust the scope to pull that back to 10 yards and a primary zero at 25?"

If your primary zero is 25 yards you'd be holding over for all distances up to that point,  yes?

And the chances are that the hold over wouldn't be large because the upward trajectory of the pellet wouldn't be steep, yes?

I tried drawing the arcs and sight lines and working out how one would correct it and got stumped.

My thinking was that if you want to pull your primary zero closer you'd have to dial the vertical turret DOWN. But I wondered if it would it require lots of change to correct a primary zero of 75 yards (or whatever it would be) and a secondary zero at 25 yards.
..........so I packed up and went to the pub.

Offline Baggawind

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Re: Blerk's Progress
« Reply #658 on: August 30, 2018, 07:46:27 PM »
Mate, there,s only two " zeroes " , a primary - the furthest POI and the secondary the closest POI which in your case will be roughly 10 yards. Between those points the pellet will rise then drop back down to the primary or main POI. Which means the pellet will strike high between those two POI,s. Your primary zero is 25yards therefor you must aim slightly low at anything closer than 25 yards. Anything beyond 25 or below 10 will require you to aim slightly high. Simply zero your rifle at say, 25 yards then , using target cards placed at 5 yard intervals down to say, 8 yards , fire shots at a mark placed in the centre of each card and you,ll notice the pellet climb and fall. Like I said , feed all the relevant info into Chairgun and you will see what i,m trying to explain. The further the primary zero the more loopy the trajectory becomes , especially with a .22.

Offline IceBlerk

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Re: Blerk's Progress
« Reply #659 on: August 30, 2018, 07:56:35 PM »
Yes, I've fed my figures into ChairGun (nice piece of software) and I can see the lines and trajectories I would expect.

But are you saying that it isn't possible to have a secondary zero of 25 yards?
..........so I packed up and went to the pub.