One shot zero
- Thread starter Pistol Ranch
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xfyrfiter
Member
Me too supernaut ,shooting is FUN
JimKirk
Member
I do what I call a cold bore hunting zero sight in...
For five days(usually straight in a row, about the same time of the day) ... I fire one shot. The next day I fire one shot at the same target. At the end of the five days ... I have a target with a five shot group on it which represents what I could expect out of my gun if I went hunting and fired cold bore shots at game. That one shot is the shot I want to know where it is going.
But... this is done after what I'll call a normal sight in. I wouldn't want to trust just one shot as a zero.
Jimmy K
For five days(usually straight in a row, about the same time of the day) ... I fire one shot. The next day I fire one shot at the same target. At the end of the five days ... I have a target with a five shot group on it which represents what I could expect out of my gun if I went hunting and fired cold bore shots at game. That one shot is the shot I want to know where it is going.
But... this is done after what I'll call a normal sight in. I wouldn't want to trust just one shot as a zero.
Jimmy K
Mr_Pale_Horse
Member
IF_ (your gun has been assembled for some time and has settled into its bedding (AND_IF (your scope tracks true and does not require one or more shots to settle, THEN_ (it works), YSMV),YSMV)
P-32
Member
The problem I have is some of us know a rifle may shoot differently when supported by a human rather than being tied down on the bench.
The other question I have is when the scope changes were made, did the scope move as indicated? The only way you will know if your rifle is truley sighted in is to fire it again.
I will agree sighting in your rifle should not cost you a bunch of rounds. I have seen too many loose scope mounts with guys trying to sight in. I can not and will not take a scoped rifle hunting until I know where the bullet is going to go, not were I think it should go.
The other question I have is when the scope changes were made, did the scope move as indicated? The only way you will know if your rifle is truley sighted in is to fire it again.
I will agree sighting in your rifle should not cost you a bunch of rounds. I have seen too many loose scope mounts with guys trying to sight in. I can not and will not take a scoped rifle hunting until I know where the bullet is going to go, not were I think it should go.
Joe Vaquero
Member
Probably would be easier and just as effective to do it at 25 yards which should make you 1.5"-2" high at 100. Sounds interesting and I think I'm going to give it a try when I sight in my deer rifle.
I use this procedure, and it does work. I zero at 30 yards, and am just about 3.5" high at 100 yards, but dead-center. At 300 yards, I am durned close, and again (barring a cross-wind) I am dead center.
Great thread, Pistol Ranch! Thanks for starting it.
Geno
Great thread, Pistol Ranch! Thanks for starting it.
Geno
Abel
Member
Abel
Member
Your "method" is just an alternate way to bore sight. It is not a way to zero. You are being misleading to the readers here by insisting that it is a way to zero; especially the novice shooters, of which I count you a member. Anyone with enough sense to turn a urine-filled boot upside down to empty it can see that to zero a rifle means to verify the shot by replication. The real loser here is the deer that you will unavoidably end up gut shooting, all because you want to save a little time and a few cartridges.
sarduy
Member
this may work if you want to hit the broad side of a barn from inside.
but not an Orange at 200 yards.
but not an Orange at 200 yards.
Pistol Ranch
Member
Geno: Here are a few quotes:
1."There is no such thing as a one shot zero".
2."This is just foolishness".
3."A one shot zero is a farce".
4."A coincidence and nothing more".
5."This may work if you want to hit the broad side of a barn from the inside".
Based on the superior intellect of those remarks/quotes we seem to be
on the wrong track :banghead: .
Heres a quote from Mark Twain..
"It is better to keep ones mouth shut and be thought a fool, than open it and remove all doubt"
P.S. Glad you enjoyed the thread !!
P.R.
1."There is no such thing as a one shot zero".
2."This is just foolishness".
3."A one shot zero is a farce".
4."A coincidence and nothing more".
5."This may work if you want to hit the broad side of a barn from the inside".
Based on the superior intellect of those remarks/quotes we seem to be
on the wrong track :banghead: .
Heres a quote from Mark Twain..
"It is better to keep ones mouth shut and be thought a fool, than open it and remove all doubt"
P.S. Glad you enjoyed the thread !!
P.R.
Last edited:
PR, obviously you just don't get it. Or you just enjoy poking the hornets' nest on this one.
The point people are trying to make:
No firearm shoots a perfect, one-hole group, cold barrel or not. If your rifle shoots 2MOA or worse, that single shot you took may be on the very edge of the group. Therefore, your next shot may be 4" away from your first shot. At 100yds, that might not seem like a huge deal. But if you take that out to 300yds, you're asking for a miss or a wounded animal. And if you're shooting small game? Have fun missing...
Your method works in theory, and assumes a perfect trajectory each and every shot. But it doesn't make sense in real-world practice.
The point people are trying to make:
No firearm shoots a perfect, one-hole group, cold barrel or not. If your rifle shoots 2MOA or worse, that single shot you took may be on the very edge of the group. Therefore, your next shot may be 4" away from your first shot. At 100yds, that might not seem like a huge deal. But if you take that out to 300yds, you're asking for a miss or a wounded animal. And if you're shooting small game? Have fun missing...
Your method works in theory, and assumes a perfect trajectory each and every shot. But it doesn't make sense in real-world practice.
jerkface11
Member
His method works. It doesn't get you a final zero but it gets you close enough. Afterwards you just shoot some groups. Then you can see what final adjustments you need.
Tim the student
Member
Then it isn't one shot. And it isn't zeroed in that one shot either. Might as well just zero as you normally would, but only shoot once, and then "shoot some groups" and "see what final adjustments you need".
MrSpiffy said:
I think this summed it up quite well. It summed up my views on it at least.
Pistol Ranch
Member
It is obvious by now that the "experts" (detractors) of this method have never tried it.
Expert= "Someone from out of town that shows up and shows slides"
P.R.
Expert= "Someone from out of town that shows up and shows slides"
P.R.
Abel
Member
I have tried it, and it works fine as a method to bore sight. It is not, nor will it ever be, a way to zero. You just can't zero with one shot. Its ridiculous to continue to claim otherwise. Thanks for comin', carry on.
25 meters (closer or further depending on firearm) one shot set scope to POI. Another round fired after scope adjustment. If it goes through the same hole then for that range you are zeroed. Willing to bet it will not go through same hole and we are only talking 25 meters!!..
My rifles are always off by at least 6" high at 300 yards when I do the final adjustments at 25 meters. Elevation does not bother me as much as being off with windage. Even at 25 meters it only takes a fraction of MOA to mess up POI at further distances.
The one round bore sight certainly works for me better than a laser bore sight (for sure) but again I would not consider a rifle zeroed until I could consistently place rounds on a target at my desired range. Just my way, but I hate to miss.
Actually there will be someone who reads this thread and did not even consider moving the cross hairs to POI after resetting their POA back to original therefore I do not believe there were to many wasted electrons in this thread.
My rifles are always off by at least 6" high at 300 yards when I do the final adjustments at 25 meters. Elevation does not bother me as much as being off with windage. Even at 25 meters it only takes a fraction of MOA to mess up POI at further distances.
The one round bore sight certainly works for me better than a laser bore sight (for sure) but again I would not consider a rifle zeroed until I could consistently place rounds on a target at my desired range. Just my way, but I hate to miss.
Actually there will be someone who reads this thread and did not even consider moving the cross hairs to POI after resetting their POA back to original therefore I do not believe there were to many wasted electrons in this thread.
Pistol Ranch
Member
jmorris
Member
- Joined
- Sep 30, 2005
- Messages
- 24,346
I have done something similar, using a Sheapard scope.
It has two separate reticles that adjust independently.
You fire a shot and put the crosshair at the point you aimed at and drive the other to the bullet hole. Then bring the other one to the same spot. With two you don't have to have the rifle in a vise because you don't loose your point of reference.
Using the method that the op suggests or measuring the difference and calculating "clicks" I always seem to have to tweak it a bit afterwords.
It has two separate reticles that adjust independently.
You fire a shot and put the crosshair at the point you aimed at and drive the other to the bullet hole. Then bring the other one to the same spot. With two you don't have to have the rifle in a vise because you don't loose your point of reference.
Using the method that the op suggests or measuring the difference and calculating "clicks" I always seem to have to tweak it a bit afterwords.
Jon Coppenbarger
Member
Ok here is what and how you do it and then the photo of the results.
Put your rifle on the bench and get a good rest for it with sand bags or in a rifle rest.
Insert your laser bore sighter in to the muzzle and make sure it is adjusted.
Then turn it on and position the red dot on the center of the target.
Adjust your scope to the center of the red dot from the laser on the target and when done you can get ready to fire.
Open bolt and insert a round and hold your crosshairs real steady on that red dot and pull ever so gently to make sure its a good shot.
Trust me it will only take one shot to get the results in the picture!
Put your rifle on the bench and get a good rest for it with sand bags or in a rifle rest.
Insert your laser bore sighter in to the muzzle and make sure it is adjusted.
Then turn it on and position the red dot on the center of the target.
Adjust your scope to the center of the red dot from the laser on the target and when done you can get ready to fire.
Open bolt and insert a round and hold your crosshairs real steady on that red dot and pull ever so gently to make sure its a good shot.
Trust me it will only take one shot to get the results in the picture!
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sarduy
Member
i can do that without ever fire a round, it's call boresighting.
Pistol Ranch
Member
For the "boresighting" advocates..i.e. fire No shot, you are forgetting that a barrel vibrates when it is fired.
Depending on the rifles bedding, barrel dimensions and the velocity of the round being fired, the bullet strike on the target will likely NOT be at the same point as indicated by the boresighting.
With one shot, the bedding, barrel and velocity result in a hole in the target.
That is where the scope is centered.
Take a rifle hunting that has been boresighted only and you risk a gut shot or a miss..
P.R.
Depending on the rifles bedding, barrel dimensions and the velocity of the round being fired, the bullet strike on the target will likely NOT be at the same point as indicated by the boresighting.
With one shot, the bedding, barrel and velocity result in a hole in the target.
That is where the scope is centered.
Take a rifle hunting that has been boresighted only and you risk a gut shot or a miss..
P.R.
AK103K
member
- Joined
- Dec 27, 2002
- Messages
- 7,610
With your method, your "assuming" the first shot went where it should and will go there again, once you dial your scope to it again. How do you know it shouldnt have gone elsewhere?
The only way to confirm that, is to fire another round, or more.
To many variables to bet the farm on one shot, especially if its for a gun used for serious things. Same goes for shooting at various distances. A 100 yard zero is just that, a 100 yard zero. If youre planning on shooting at other distances, you need to confirm them too.
Everything is just theory until you prove it.
The only way to confirm that, is to fire another round, or more.
To many variables to bet the farm on one shot, especially if its for a gun used for serious things. Same goes for shooting at various distances. A 100 yard zero is just that, a 100 yard zero. If youre planning on shooting at other distances, you need to confirm them too.
Everything is just theory until you prove it.
My debugger was taken for a loop. You have an uneven number of parentheses.
Otherwise, that's an excellent nutshelling of the debate.
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