Thread: 25m zero

Literally just zeroed in at 25m into the coal bunker with my m77 .270 using federal 150 grain powershock after putting on a new scope and suppressor. Ive got nowhere further to test it today. Is it possible to find out the expected bullet trajectoy at say upto 200? Being zero at 25, Where would it be zero again? I realise theres a huge range of variables but lets just say perfect conditions and the ammo performs the way it says it should..

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Look up ballistics calculator in google and have a play. Not sure if yhey go down to a zero that close?

Ps dont relly on it if you find anything, practise at the range you want to shoot to and everywhere in between

Whats the velocity and bc of the bullet I can get it off my phone with that imformation.

Down load Remington Shoot. It will tell you.. I am going to guess somewhere between 240 and 300. Would call it at 265

Nope just just checked using Remington 150 grain PSP and the answer was 223

Originally Posted by Rushy

Down load Remington Shoot. It will tell you.. I am going to guess somewhere between 240 and 300. Would call it at 265

with the rough numbers I'd imagine them to be it was around 265m Rushy so top job

Not the best practice, much better to zero as far away as you can then the errors at close range will be negligible. If you zero at close range the errors at longer ranges can be substantial.

e.g if you're only a fraction out like half an inch at 25m, I doubt you'd even know you were out, but that little error equates to 2'' out at 100y, and 4'' out at 200y ....and if you shoot out to 500y then that would be a complete miss or a gut shot.

kj

Originally Posted by Toby

with the rough numbers I'd imagine them to be it was around 265m Rushy so top job

Just a machine Toby.

Originally Posted by kimjon

Not the best practice, much better to zero as far away as you can then the errors at close range will be negligible. If you zero at close range the errors at longer ranges can be substantial.

e.g if you're only a fraction out like half an inch at 25m, I doubt you'd even know you were out, but that little error equates to 2'' out at 100y, and 4'' out at 200y ....and if you shoot out to 500y then that would be a complete miss or a gut shot.

kj

I do intend to zero it at 100 but I was just lining things up the best I could at home. We dont have a range down here that I know of unfortunately. Will have to wait till im in the wops.

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Originally Posted by Toby

Whats the velocity and bc of the bullet I can get it off my phone with that imformation.

Thanks mate got it sussed.

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I always use to sight my rifles @ 100, was told thats the way you gotta do it. But lately i have been zeroing at 25, and I mean exactly zero, and then checking at 100 or 200. And surprise surprise the last 3 rifles have taken me either 7 or 8 rounds to get it right - 2 at 25 and then a 5 shot group at 100 to check zero and group. And all have been exactly where I want them, either 2.5 or 3.5" high depending on calibre and speed. So yes it is possible to get it right at 25, but definitely check it at 100 or 200 as soon as you have the opportunity.

On a slightly different tack, does anyone know of a ballistics calc or website where your starting point is something like 2 inches high at 100, and then get trajectory info ? I guess you could call it an offset...

Originally Posted by ebf

On a slightly different tack, does anyone know of a ballistics calc or website where your starting point is something like 2 inches high at 100, and then get trajectory info ? I guess you could call it an offset...

Yeah, I want that too ...

Try the Hornady ballistic table.