The Accurate Reloading Forums
Seventy-Five Common Accuracy Gremlins
Seventy-Five Common Accuracy Gremlins
Zero-Drift raised this term in another thread:
"The 75 Common Accuracy Gremlins"
I think I know most of the "common" issues like, "Don't sneeze with your finger on the trigger." 
Headspace, runout, weight variation in components, trim length, seating depth . . .
But what about the more arcane stuff? Can we get a thead going for discussion of these bad boys?
Thanks . . .
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.223 Ackley Improved Wildcat Forum:
http://www.hotboards.com/plus/plus.mirage?who=223ackleyimproved
[This message has been edited by Genghis (edited 04-25-2002).]
26 April 2002, 07:00
ReconoThis has probably been mentioned already.
63. Going to a new range and forgetting to allow for the Coriolis effect.
One of the biggest....
71. Proper allignment of the space time continuem allowing for proper harmonic balance between bullet in flight and the size of the shooters left, big toe.
JAG
26 April 2002, 15:45
<Abe Normal>Recono,
Any well-informed shooter knows full well that the Corollas effect has little if any measurable affect on shots of less than 1 thousand meters.
However, magnetic degrees of declination do most certainly need to be taken into account at any new range! For instance here where I shoot the delineation is 7.2 degrees but when I go over to west TN to shoot with my father in-law I compensate for the 8.7 degrees magnetic declination that is found at his local range.
One must endeavor to keep up with this sort of cause and effect Newtonian physics if one is to maintain any sort of reasonable group size!
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Abe
If everyone thought like me, I'd be a damn fool to think any differently!
Don't forget the attempt to accuracy test a range of loads with 18month old twins in the car wearing ear muffs!
How about Gyroscopic Drift, "The lateral deviation of the trajectory of the plane of departure caused by the rotation of the projectile". SAY WHAT? It means a bullet will drift right if shot from a right twist barrel
27 April 2002, 14:52
Willie BWe're working on that Gyroscopic Drift. Gonna make a barrel with right twist for the first half of it's length, then left the rest of the way. Gotta glass it solid to the stock, though. Have to hold down the barrel vibration.
27 April 2002, 17:08
<waldog>#34:
After a .001' group, anchoring 5 consecutive vermin at +1000yds, or other superhuman feat... the head will swell accordingly thereby altering the parallax between the scope and eye. Thus, accuracy is temporarily impared until the swelling is releived by humility. 
27 April 2002, 17:56
craigsterNerves in the anal and cranial areas of the body become confused and disorietated. What develops is referred to as a shitty attitude. For most the condition is temporary, in others it is chronic.
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there's a fine line between hobby and insanity
quote:
Originally posted by craigster:
Nerves in the anal and cranial areas of the body become confused and disorietated. What develops is referred to as a shitty attitude. For most the condition is temporary, in others it is chronic.
Actually, current literature argues that the cranial effects are more or less isolated to the visual field. This phenomenon is significantly interdependant upon certain thoracic symptomology, thereby resulting in a characteristic syndrome that has been called "optic rectitis" -- manifest in a fecally predisposed point of view.
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.223 Ackley Improved Wildcat Forum:
http://www.hotboards.com/plus/plus.mirage?who=223ackleyimproved
28 April 2002, 00:37
arkypeteHey Guys
You forgot the most import of them all.
You have to know where the ore for the bullet came from.
Southern Hemisphere copper or lead does not go with northern hemisphere copper or lead or steel. Plus the northern hemisphere alloy bullet is naturely attracted to northern hemispere targets. And Southern hemispere bullet alloys are are, by their nature trying to return to their area of origin.
Jim
28 April 2002, 02:06
Willie BNOW I KNOW WHERE THAT LAST BULLET WENT!!!!
IT HEADED SOUTH!!!! (I think)
28 April 2002, 05:42
craigsterA fecaly predisposed point of view...I like it.
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there's a fine line between hobby and insanity
26 May 2002, 14:56
<Abe Normal>quote:
arkypete,
Hey Guys
You forgot the most import of them all.
You have to know where the ore for the bullet came from.
Southern Hemisphere copper or lead does not go with northern hemisphere copper or lead or steel. Plus the northern hemisphere alloy bullet is naturely attracted to northern hemispere targets. And Southern hemispere bullet alloys are are, by their nature trying to return to their area of origin.
This most definitely explains my observations at the range! After all I�ve used not but the finest powders, primers, brass, bullets and fired from the best rifles on the best days of moderate temperatures and low humidity and no cross winds. Of coarse, I as well, (not to be boastful mind you) am able to shoot the fly $h!t out of pepper at 100 yards and always do my part. However, there have been a number of unexplained holes that appeared in the targets that I was firing upon that seemed to be of a similar caliber to that I was shooting. But until you were so kind as to pass on this information regarding the Southern Hemisphere metallurgy phenomenon I was almost of the opinion that it may have been something I could have done or was doing wrongly!
Many gracious thanks! I�ll be sure to make the proper inquiries upon my next trip to the reloading supplies shop to insure that I�m purchasing only Northern Hemisphere metals.
OBTW: Should we also take this phenomenon in to account when purchasing powders? Further, how can we verify that the primer compounds are matching/compatible with the metals of the cup and anvil?
27 May 2002, 02:55
<eldeguello>I'm amazed that everyone seems to have overlooked moon phases, sunspots, and the ever-important Solunar Effect!!
27 May 2002, 08:38
Bill LeeperAbe Normal,
Does magnetic declination variation have a greater effect on the Norma steel jacketed bullets? I've been thinking of trying some of these but maybe I shouldn't bother if I have to recalibrate for each range location. Regards, Bill.
27 May 2002, 09:44
craigsterAh, if only Eistein was here to ask.
Einstein once said something to the effect of,
" The act of observing any phenomena, will change the characteristic behavior of the phenomena being observed."
This is why you always shoot your best groups when you're by yourself. When your buddies are watching, they are messing everything up!!!
27 May 2002, 19:08
HerrBergNot to mention the accuracy lost to the bullet spin caused by the barrel twist. In my custom .22LR Ackley Improved, I spin the bullet clockwise in the first half part of the barrel, then counter-clockwise.
![[Cool]](images/icons/cool.gif)
Regards
/HerrBerg
28 May 2002, 10:11
<Abe Normal>Bill Leeper,
I suspect that you Canadians have a department of Measures and Standards, or some such the like. Here in the States we have the "National Bureau of Standards". A quick check with that agency those folks should only too happy to give you a wealth of information regarding the physical properties of the Norma steel-jacketed bullets you intend to use. With that information and knowing the "Degrees of Magnetic Declination� at the shooting range in question, the twist (right or left) of your rifle barrel as well as the turns per foot/meter you�ll be able to determine how much "windage & elevation" you'll need in order to assure a perfect zero for every shot!
As you may have surmised by now, these calculations will need to be recalculated for every differing distance you intend to shoot from your intended target.
ADDITIONAL:
As you will be using only Norma bullets there is no need to remove the lead from each bullet in order to weigh the steel to insure consistency. Because Norma produces one of the highest quality products available and has done this work for you. Simply reference the "Standard Weights" sheet that came with your carton of bullets.
However, should you think about the use of a lesser quality steel cased bullet this will of course become essential if accuracy is to be kept to any minimal standard of acceptance.
Should you have further questions regarding this oft over looked effect I recommend you peruse the wonderful FAQ that Saeed has posted elsewhere on this fine web site.
28 May 2002, 11:48
<eldeguello>Einstein once said something to the effect of "The act of observing any phenomena, will change the characteristic behavior of the phenomena being observed" This is true in quantum, but not Newtonian physics. Which of these is the most pertinent here?
28 May 2002, 12:06
<centerpunch>quote:
Originally posted by centerpunch:
. . . and so� on to Schrodinger's cat.
Don't know if it's true, but Stephen Hawking was quoted as having said that when he hears of Schrodinger's cat, it makes him want to get his gun.
I guess intelligence doesn't necessarily preclude common sense.
29 May 2002, 12:03
hivelosity
ThE OnLY GReMliN iN mY RELOADING IS mE.
quote:
Originally posted by eldeguello:
Einstein once said something to the effect of "The act of observing any phenomena, will change the characteristic behavior of the phenomena being observed" This is true in quantum, but not Newtonian physics. Which of these is the most pertinent here?
Well,Larry
I never can shoot worth a damn, when that know-it-all Newton's watching me. And then he starts in with that Action/equal and opposite reaction crap. Which means every time I cuss, He laughs!
30 May 2002, 05:30
Need Just 1 More GunI once had a priest exorcise the demon in my rifle and it shot the hell right out of the barrel.
Now it shoots like an angel!
I think the curse came when a friend said "damn you and your rifle!" right after I shot a better group than him.
30 May 2002, 06:12
Dino32HRNumber 68: You MUST convince your wife that the level of skill you develop in shooting sports is directly proportional to the NUMBER of guns you have !
30 May 2002, 15:45
claybusterDouble ought buckshot is TOO much for trash picking stray cats at under 15yds,,,,The finer pieces wash out with the garden hose ok,,,,,but there's too many other chunks to pick up.Thinking about switching to # 4 shot
30 May 2002, 16:06
claybusterI forgot to ask if it's safe to assume the bulk of lead shot comes from south america,,so I can get the right shot rotation in my smoothbores when I pack the empty hulls.
quote:
Originally posted by Dino32HR:
Number 68: You MUST convince your wife that the level of skill you develop in shooting sports is directly proportional to the NUMBER of guns you have !
I don't keep tabs on her shoes. She needs to not worry about how many guns I own. Marriage takes hard work and considerable compromise.