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HighBall5 10-18-2007 09:07 AM

Sighting in .270
 
I bought a .270 savage with a 3x9 nikon monarch scope. Does anyone know the ballistics on this? Im shooting 130grain bullets.

I was thinking 50yds, that way it will shoot a little high at 100 and right on at 200?

stalkingbear 10-18-2007 09:26 AM

RE: Sighting in .270
 
What distances are you going to be shooting? For medium range,1-1.5 in high at 100 yards will keep you on at 225,for long range-sight in EXACTLY on at 25 yards which is 1.5" high at 50 yards,3" high at 100 yards,3.7" high at 200 yards,dead on at 300 yards,7.8" low at 400 yards,leaving you 350 yards point blank,no think range. That is compiled based on average of factory 130 gr loads.

starhunter21 10-18-2007 09:30 AM

RE: Sighting in .270
 
Most (some) factory ammo boxes have the balistics on them, if not hop over to www.federalpremium.com. They have all the balistics the their offerings which should get you close. Great caliber by the way!

bigpapa 10-18-2007 09:31 AM

RE: Sighting in .270
 
Yea! What he said! Great reply Stalkingbear.;)

bigbulls 10-18-2007 12:42 PM

RE: Sighting in .270
 
I have my 270 sighted in aproximately 2.5 inches high at 100 yards and that allows me to be no more than +-3 inches to 300 yards. Stalking bear is talking about the same method of sighting in but he is giving a little more than 3 inches above or below point of aim. I just personally like to use 3 inches above or below point of aim.

I sight in all my rifles this way. +-3 inches.

HighBall5 10-19-2007 11:36 AM

RE: Sighting in .270
 
Thanks for the replies. I think im going to sight it in 2.5 high at 100.

TUK101 10-19-2007 01:43 PM

RE: Sighting in .270
 
The Remington Shoot program says to be 4.5 inches high at 100 yards so that you hit the bull at 300 yards. I never liked doing that since it makes it hard to hit anything under 100 yards if you zero like that. 2-3 inches high at 100 should allow you to hit anything out to 300 yards. Just make sure that you get it grouping consistantly at 100 yards and you should be doing allright. Most game is taken under 100 yards and closer to 50 anyways.

TUK101 10-19-2007 01:45 PM

RE: Sighting in .270
 
Oh and if you are wondering what the ballistics are on the 130gr Core Lokt ammo, it says it is 3060fps at the muzzle and a ballistic coefficient of .336.

stalkingbear 10-19-2007 02:19 PM

RE: Sighting in .270
 
Tuk-something is wrong somewhere cause I run mine from experience AND sierra infinity. I would tend to think the infinity program is more accurate. One of us messed up a tad. lol

HighBall5 10-20-2007 05:17 PM

RE: Sighting in .270
 
Thanks, I am using the Core lokt ammo actually. I sighted it in today. It was about 1 inch high at 50yds, but it looked more like 4 inches high at 100.

Could this be correct or do you think that my hold was off?

skeeter 7MM 10-20-2007 09:17 PM

RE: Sighting in .270
 

ORIGINAL: HighBall5

Thanks, I am using the Core lokt ammo actually. I sighted it in today. It was about 1 inch high at 50yds, but it looked more like 4 inches high at 100.

Could this be correct or do you think that my hold was off?
Only way to know where your POI will be at varing ranges is to shoot groups at those ranges. Letyour gun do the talking not ballistic programs or paper data. The info posted prior wasballparknot gospel, so if your groups at 100 yards were 4" high then that's right for your load/gun. Wether that is right for your hunting situation...you'll have to determine that.

For the majority of my hunting when my 270 was on deck I sighted in + 2.5" @ 100with 130gr pills which allowed me to hold fast to 300 yards without worrying about hold over.

stubblejumper 10-20-2007 09:17 PM

RE: Sighting in .270
 
Read all of the ballistics tables you want.Then sight the rifle in at whatever height above zero you choose at 100 yards,be it 1-1/2" high or 2" high.Then shoot the rifle at 200 yards and then 300 yards and you will know for sure exactly where the point of impact is.Ballistics programs and tables are only theory,and blindly trusting them has resulted in many people wounding or missing game.

Ideaman 10-20-2007 09:21 PM

RE: Sighting in .270
 
Absolutely, positively, irresponsible to shoot at a range you have not practiced at. You wanna shoot 500 yards take a few hundred shots on a 500 yard target.

Ballistics charts are pure math on very specific gun configurations. Stated ballistics seldom match when chronographed. Scope height, average temperature, barrel manufacture, and a whole bunch of other things cause stated ballistics not to be true. I have way too many holes in my 100 yard shooting house that came from people whoCALCULATED their shot.

Anybody out there that can calculate where a bullet will hit every time, call NASA, they have been looking for you.

stalkingbear 10-20-2007 09:31 PM

RE: Sighting in .270
 
I wholeheartedly agree that the ONLY way to know for SURE EXACTLY where your specific setup is going to impact,you have to shoot it at ranges in question. The ballistic programs are kinda like boresighting the way I see it-they'll get you on paper. There's a lot of variables on dimensions/tolerances to predict individual rifles' performance.

Wilds 10-20-2007 10:05 PM

RE: Sighting in .270
 

ORIGINAL: Ideaman

Absolutely, positively, irresponsible to shoot at a range you have not practiced at. You wanna shoot 500 yards take a few hundred shots on a 500 yard target.

All to often though, that point is missed by a wide margin.

Pun there.......

eldeguello 10-21-2007 08:10 AM

RE: Sighting in .270
 

ORIGINAL: HighBall5

I bought a .270 savage with a 3x9 nikon monarch scope. Does anyone know the ballistics on this? Im shooting 130grain bullets.

I was thinking 50yds, that way it will shoot a little high at 100 and right on at 200?
I've owned two .270's, both Mannlicher-Schoenauer fullstock carbines with 20" barrels. I had two loads, one used the 130-grain Nosler Partition bullet with 55.5 grains of IMR 4350, and the other used the 150 grain Nosler Partition with 53.5 grains IMR 4350. I zeroed these rifles to hit +4"@ 100 yards. They then hit +4" @ 200 yards, and 4" @ 300 yards, and BOTH BULLET WEIGHTS shot to essentially the same POI at 100 and 200 yards. (A known propensity of the .270 Win., and the .375 H&H as well.)

The last .270 M/S was one I bought in 1964. After mounting a Lyman Alll-American 4X fixed-power scope on it and zeroing it in 1964, every year after that I'd fire ONE ROUND each fall to check the rifle's zero before hunting with that rifle. I sold it in 1987, and when I sold it, it was still shooting to the exact same POI it was zeroed for in 1964! In all those years, it NEVER CHANGED zero - what a dummy I was for parting with that rifle!!!

stubblejumper 10-21-2007 09:30 AM

RE: Sighting in .270
 

The hard part to get folks to understand is that the results they give are only as accurate as the information they are fed.
You must know a few things to get good results
exact velocity
ballistic coefficient ( your actual BC, not the manufactures published BC)
exact heigth of site from bore center to center
Loading manuals,ammunition manufacturer tables,or ballistic programs do not provide this information regardless of what people may believe.Predicted velocity,and manufacturers BCs can be quite different from the actual values.

Wilds 10-21-2007 11:25 AM

RE: Sighting in .270
 
Nuthin' replaces trigger time..........

eldeguello 10-21-2007 12:05 PM

RE: Sighting in .270
 

ORIGINAL: HighBall5

Thanks, I am using the Core lokt ammo actually. I sighted it in today. It was about 1 inch high at 50yds, but it looked more like 4 inches high at 100.

Could this be correct or do you think that my hold was off?
Indeed, it COULD BE +4" @ 100 and be +1" @ 50.... All rifles are at least somewhat different than the other ones...... Try it now at 200, and see what happens. And also at 300, if you have access to a surveyed 300 yards.

I never missed by overshooting with a zero that was +4" @ 100 and the same at 200. However, I believe anything that hits muchabove +4" at 100 and200 will have a maximum ordinate of+6" or perhaps more, and that's enough to cause midrange misses.

stubblejumper 10-21-2007 02:21 PM

RE: Sighting in .270
 

exactly stubble, but once you have it figured out its pretty easy to build a reliable drop chart, The last one I worked with I did the measuring of the scope heigth, chrony'd the velocity and printed out a chart for an alt of 2800 ft and bar pressure of 29.6.
went shooting and dialed my scope to the chart for 660 yrds, group was 1.5" above POA, went home and tweaked the published BC, and that put it right on.
The bottom line is that you still shot the load to verify the point of impact,something that far too many people never do.Too many people simply look at a published chart,sight the gun in at close range,then go hunting and take longer range shots hoping that the chart is correct for their load and rifle.

bigbulls 10-22-2007 01:42 PM

RE: Sighting in .270
 
To play devils advocate here IMHO even someone that can only get to shoot at a 100 yard range and even if they can only use published data if they have any sense about them they should be able to make a shot out to 300 yards with out any problems. A 300 yard shot should be a piece of cake for most grown adults that actually know how to shoot.

This is assuming that they do get out and shoot regularly enough at 100 yardsto knowtheir rifle.

nksmfamjp 10-22-2007 01:58 PM

RE: Sighting in .270
 
Be carefule about sighting in under 200 yards. it is hard to get your windage zero'd at less than half of your final max range. Just my opinion. Even a hundred yards can be a bit too close. Over 300 and you will have to figure out if the wind or scope alighnment pulled it off center. I usually sight in at 100, but like to check out further.

HighBall5 10-22-2007 09:30 PM

RE: Sighting in .270
 
Awesome replies, I have access up to five hundred yards at least, I also have a rangefinder. I was thinking about buying one of those gun clamps at walmart for a steadier hold at 300.

stubblejumper 10-22-2007 10:10 PM

RE: Sighting in .270
 
I won't use any type of rest that clamps the gun in place,as they can effect the point of impact.

skeeter 7MM 10-22-2007 11:44 PM

RE: Sighting in .270
 

ORIGINAL: stubblejumper

I won't use any type of rest that clamps the gun in place,as they can effect the point of impact.
+1 Get yourself some sandbags to steady the rifle instead. I like a larger one under the forearm and smaller under the butt, though it depends on the line to the target from the bench. I make sandbags out of coverall and pant legs...cheap but effective.

nksmfamjp 10-23-2007 08:39 PM

RE: Sighting in .270
 

ORIGINAL: skeeter 7MM


ORIGINAL: stubblejumper

I won't use any type of rest that clamps the gun in place,as they can effect the point of impact.
+1 Get yourself some sandbags to steady the rifle instead. I like a larger one under the forearm and smaller under the butt, though it depends on the line to the target from the bench. I make sandbags out of coverall and pant legs...cheap but effective.
+1 Caldwell makes a cheap front and rear bag that can be very accurate for sighting in. It may not win a BR contest due to their need for quick adjustment, but there is no arguing with the stability of packed sand. It is also pretty close to POA in position shooting. Still, before using in the field, readjust your zero for your results from prone, or whatever position you will use for long shots.

Ideaman 10-23-2007 09:42 PM

RE: Sighting in .270
 
I feel OK about clamping the Buttstock myself, but dont want anything around the action or barrel.

stubblejumper 10-24-2007 06:04 AM

RE: Sighting in .270
 
:D

I feel OK about clamping the Buttstock myself, but dont want anything around the action or barrel.
Clamping any part of the gun can result in a different POI.

Ideaman 10-24-2007 08:30 PM

RE: Sighting in .270
 
Position of the moon can change the point of impact. I agree clamping can change POI, I just dont think to someone using it on the butt only, it would be an issue.


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