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Okay, so I'm in a slight pickle. I've been trying to understand how to sight it properly.
Objective: 100m zero
Range: 35m
Rifle: Savage Axis .270 Stainless Steel
Scope: Weaver 3x9 40mm
Laser: StrongTools Green Boresighter
I'm thinking, range at 25m and 3 clicks up to zero point at 100m. am I wrong?
As you're in pretty close at 25m , you have to accommodate the parabolic curve of bullet flight. The image below is a bit simplistic but gets the point across. The bullet rises quickly and then drops, so zeroing at 25m will be pretty far off. Of course that depend on the weight and velocity of the bullet.
Nothing wrong with the initial setup up of the scope at 25m ( align the optical and mechanical axis). I do that and leave it about 1" high of POA. But I wouldn't trust the accuracy at 100m until I actually zeroed again at the 100m.
note: if you're new to looking at bullet trajectory charts be aware they are grossly misleading because of scale. The rise ,'Y' is in inches and he 'X' is in yds ...so it's shows huge parabolic curves like you firing a mortar. The actual curve is really much slighter.
https://i.imgur.com/deSCNmZl.jpg
https://i.imgur.com/ElEJ11Hl.jpg
The reality and simple explanation is that you initially want to get on paper bullseye with your scope / rifle setup at 25 meters.
Then you must proceed to fine tune at 100 meters.
No escaping the need for this to ensure accuracy.
25 yard 0 and 200 yard 0 is kind of a rule of thumb for spitzer point bullets.Most Big game Calibers(unsure about Magnums)
At the end -Your desire and your bullet will dictate where are You to be at 100 y.
If You want to be 0" in general "at 200 y,You will be somwehat high at 100 y.That depends on your bullet(look up Ballistic charts for this).
That will tell You (lets say should be at 1.5 " high at 100 y to be zero at 200 y)AND You are hitting 1.5 high at 100 y,but center,You made it.
Still -need to verify the ranges You want to shoot at(like 50-100-200 y should be good enough for Ontario)
In the second image that Mike posted, the bullet crosses the level line of sight around 35 yards and again at about 235 yards - which is your optimum sigh-in distance for that bullet/load configuration.
IMO, folks that sight in for 100 yards/metres are short-changing themselves for longer shots as the line of sight is slightly negative (less than horizontal).
The actual range and point of impact will vary due to the firearm and cartridge characteristics and weather conditions. Good luck!
Better yet use the Maximum Point Blank Range (MPBR) system. Think of the kill zone as a piece of pipe and give yourself some room. For deer think of the kill zone as a 6in pipe, then you will have a couple inches up and down of error. Sight in your rifle so that you will never hit outside that pipe out as far as possible. For example, my 222 Rem is sighted in at 215 yards with a 50gr Vmax coming out of the barrel at 3220fps. That gives me less than 2in above or below the line of sight out to 250 yards. A coyote inside 250 yards I just aim for the center of the boiler room and pull the trigger.Quote:
Originally Posted by Sam Menard
There are calculators online you can use if you know the velocity of the bullet and the profile but based on box ballistics you can get close by doing this MPBR system. The standard 2in high at 100 yards is fine for a good chunk of Ontario with anything in the 3006 class but if you take the MPBR system into account with 30-30, 45-70, 44 mag, for deer you can really stretch out the range with no hold over and for longer shots on moose or deer in open areas like around here you can really give yourself an advantage by using this method and knowing that you can shoot a deer on the other side of the field without guessing.
Good advice. I didn't know it had a name (MPBR).Quote:
Originally Posted by Fox
Quote:
Originally Posted by poltrojan
How about your ammunition? Do you reload it or do you buy it manufactured. If you buy it, who is the manufacturer? Are you planning to use the ammunition from that manufacturer in an ongoing basis. Once you set the rifle in, any change in the components of the ammunition you use, is going to move your point of impact about. Beware ammunition manufacturers don't all use the same component regime. There are even variations to components from lot to lot with the same manufacturer. Such variations may not effect the point of impact a great deal, but it does make it difficult to consistently drive tacks. Just thought I should pass this information a long to you.
You don't stop hunting because you grow old. You grow old because you stop hunting.
- Gun Nut.
Very good point-LOT control is very important. When figure out what You will shoot: buy 3-5 boxes of the same LOT.Quote:
Originally Posted by Gun Nut
Or more-if You will be shooting volumes.
You could bet on point of impact changes lot to lot.Maybe still OK for deer size target,but why taking chances.
Winchester 130/150 gr Super X Power Point. I bought both, but I'm thinking I will stick with 130 gr.Quote:
Originally Posted by Gun Nut
Based on Winchester's ballistics calculator if I sight it at roughly 35-40 yards, the trajectory will zero in at 200 yards.
Attachment 41525
You still need to shoot it at the ranges you plan on hunting to be ethical about taking a shot.Quote:
Originally Posted by poltrojan
At 35 yards if you are "good" you may be well off at 200 yards.
which range? they're all closed to public access. Even recently "Oshawa Clay and Target Club" closed the public access to shotgun trap shooting which I had been using in the past 3 years. I have no-where to sight or shoot trap. I can't afford right now to get 'membership' budget is tighter now than it was.Quote:
Originally Posted by Fox
I can help You to take You to a shooting range. I will need to confirm if i am Ok to take in guests ,just because of Covid -at one time we were not-then Yes-so do not know what it is now.If interested,i can ask.Then we do one afternoon ,from 5 pm.
In a month should be fine for daylight.
You would need to drive to Cambridge though.
Let me know.
Wow.... Thank you very much for the offer, but its way to far (Oshawa), what makes it worse I have to drive through GTA.Quote:
Originally Posted by gbk
Since I work for Bell, my schedule is not stable at all, due to high turnout during COVID we get sporadic off-days or overtime, unpredictable right now.
as for gun sighting, anyone seen between below 130 gr in 270 Winchester factory loads on the shelves?
From the experience shared with me by customers over the years, a lot of .270 Win. rifles are difficult to get an accurate load worked up for some of the lighter bullets available. Not saying you will encounter the same problem. Maybe some others here can share their experiences. It seems that the 90 grain and 100 grain bullets { for reloading} are quite short so there is quite a jump from the bullet to the rifling. I just don't know if what you might gain in less recoil or whatever you hope the lighter bullet will do for you will be accurate enough for the trade off.
Hopefully, some others can help with this.
My .270 really likes 120gr. If you can find them
It is not my issue, what I am saying is that sighting in at 35 yards and then shooting at deer at 200 yards assuming you are on target is a very bad idea and very unethical.Quote:
Originally Posted by poltrojan
If you do not have a range then shoot it at 35 to get it close then the day before your hunt shoot it at 100 yards and 200 yards to know that it is on.
I’m way south of you but I can give you 500yd any day of the week west of London
Facing the same problem here actually.
my 0.27 win tikka likes 130gr at the range I found out, but I havent tried enough to know this for sure. my shooting range also 35 yrd. or maybe 25 even ! target shooting... and other places do not allow guest and not taking new members. [if anyone can direct me to one that does, pls send me PM]
you can find crownland north of you but would be an hour or two drive, but most allow gun fire for hunting only ... how strict are they on 3 longer range shots there to get the 100-200 mark dialled in ? no idea, maybe the more experienced hunters can advice on this ?
If you can find 100yd sight n spot at 1” high your good for 200Quote:
Originally Posted by Ata83
With my 22-250 I find Remington ammo better than Winchester’s.
Yes one dealer close has .270 120gr on shelf. Just noticed closer dealer has 100gr on the shelf. I’m going to get box of 100gr to try out $32 a boxQuote:
Originally Posted by poltrojan
Make sure that you are using a bullet that is actually designed for the game you are planning to hunt though, a 100gr GMX for deer, fine but many of the 100gr bullets in that caliber are varmint bullets and will be too lightly constructed for deer.Quote:
Originally Posted by js4fn
We’re muzzleloader only here. These will be for tannerite the fun animalQuote:
Originally Posted by Fox
That's a very important observation. I have a Ruger M 77 .270Win rigged for varmint/predator light weight loads sighted in for 1MOA @ 200M and a Rem 700 .270Win rigged for big game heavy loads 1MOA @ 200M. When taking both to the range and switching bullet loads,with the exact same hold,the difference is as much as 3MOA. When holding free hand or a not so steady rest (tree limb or fence rail) other than a bipod,the difference is even greater. To me,it's very important to not mix up ammo boxes when heading out (don't laugh,it's happened.)Quote:
Originally Posted by Fox
Most scopes now you can reset the turrets. If you zero your gun with your big game load, reset your turrents to zero them, then sight in with the sporting ammo. Make a label for your load with the turret info and you can always go back there. Of course you need to verify before going hunting but it will get you back to where you should be if your scope does not break.Quote:
Originally Posted by trimmer21
I have a 6.5x55mm mauser and part of me wants to load up some high BC match bullets that will also work for varmints and just adjust this way to go between the 2. I just have to make sure that I do not use bullets that look the same, so my hunting bullet is an ELD-X, I cannot go with an ELD-M as I may mix them up. The Nosler RDF 140gr would smack them and fragment like crazy but a lighter bullet would get there a bit faster and bit a hint flatter.
You have to sight in at 100 to know where it hits at 100. Personally 3006 I sight 3" high at 100 gives me point blank out to 300.
That,too,works very well. In fact,my .30-06Sprg is set like that for shooting across swamps and on hydro lines. At ranges of 100M,I find it's easier to adjust the aim point than continually mess with turret settings. I'm a big believer in "set it and forget it".Quote:
Originally Posted by lazyman