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.270 wsm

09 Nov 2019
@ 08:29 am (GMT)

Brandon Donewar

question, I have a Browning .270 WSM and my local shooting range is only 50 yards I was wondering where I should be at 50 yards to be 1" high at 100 yds. 130gr bullet. any advice would be greatly appreciated.


10 Nov 2019
@ 05:15 am (GMT)

Paul Leverman

Re: .270 wsm
Brandon, an easy way is to use the Hornady online ballistic calculators. Use your bullet weight, velocity, etc in the drop down fields, hit "calculate". All your info is there.
10 Nov 2019
@ 08:14 am (GMT)

Ryan Nafe

Re: .270 wsm
I agree with Paul, I’ve had very good success using the Hornady calculators for doing exactly what you’re trying to do, Brandon.

For several years now it’s been standard practice for me, when working with a new rifle or optic that has yet to be shot, to get a rough measurement of the height of the sight above the bore, the velocity and BC of the bullet, and then set the zero in the calculator. Then I see how high the calculator tells me it’s impacting on paper at 25 yards, and get the rifle hitting right there. Then I back off to what I’d actually like to be zeroed at, do a bit of fine-tuning, and it’s good to go.

It would be important, however, to do whatever you can to actually be able to verify your zero for real. I’ve had decent success with the above method, but it’s almost always a bit off when I step out to the longer distance. So use caution here.
10 Nov 2019
@ 09:21 am (GMT)

Nathan Foster

Re: .270 wsm
Hi Brandon, as Paul said, Hornady have a calculator. A main factor is to ensure that your sight height is correct. You can obtain this by measuring from the center of your scope rings (center of scope) to the center of your bore as best as you can ascertain.

Once you have the sight height, bullet desiign and velocity, you can get the math underway.

Just keep in mind - sighting in 1" high at 100 yards can handicap a .270 WSM quite badly. This sight setting will be fine for closer work but if you are using the rifle in mountain terrain, it will pay to sight the rifle to be atleast .7" high at 50 yards, putting it very roughly around 2" high at 100 for a zero of around 270 yards and 2" low at 300 yards. Thats a fairly easy rule of thumb to remember (a 270 zeroed at 270Y) if you are not so good with the higher rule of 3 method.


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