Why you're almost certainly measuring your groups inaccurately.

Dr.Lector said:
No.
Get your math in order.
The difference between .265" and .308" is NOT .09".
Use a calculator if it gets too complicated for you.
Click to expand...

Ok, tell you what - give you ten minutes to figure out the error in your thinking, if one can call it that, and then I'll post why you're wrong.

And an needlessly antagonistic Richard, but most importantly, just plain wrong.

I'll give you a clue though - you're totally right! .308 minus .265 sure isn't .09. But that's not the correct question.
 
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flashman said:
Ok, tell you what - give you ten minutes to figure out the error in your thinking, if one can call it that, and then I'll post why you're wrong.

And an needlessly antagonistic Richard, but most importantly, just plain wrong.

I'll give you a clue though - you're totally right! .308 minus .265 sure isn't .09. But that's not the correct question.
Click to expand...

You forgot to say "BAZINGA!" LMFAO
 
flashman said:
I recall no mention of prizes; we don't have the budget for that.
Click to expand...

there is no room for error when one shoots single shot 1 hole groups, measured any way your can handle it and it will be one hole, could be slightly larger or slightly smaller then the original bullet diameter which can be explained very simple, no matter the size of your paycheck it always leaves a larger hole on your credit card yet a smaller hole in your bank account depending on the light and angle that you look at said hole
 
I strictly shoot rimfire. I fire four 5 shot groups and 4 single sighters, 1st pic as an example. The 4 sighters are for determining a bullet diameter to subtract from the group size since the hole in the paper will not be the same as the bullet diameter. Measure the groups outside to outside, then subract the average of the four sighters to give a final group size. This was how I was taught to measure groups.
Flashman, I'm not being rude to you here :d but I have a target your method won't work on I believe. Pic #2. This is a five shot group at 50 metres, 22 calibre. The group measures .277", how do I get the outside edge to inside edge on this?:p My final measurement was group size .277 minus single hole diameter .220 = .057"
Here is another target I posted a while ago, third pic. The second pic is taken from the bottom row of groups in the third pic. Any way someone posted this pic (#3) on an American site and it caused a bit of a kafuffle (my measurements are horse hooey), reason being they didn't know it was a downsized version of the ARA 50 yard benchrest target. To make a long story short a bunch of US shooters use a program called OnTarget http://www.ontargetshooting.com/ to measure their groups. This seems to be a good method to use. Just a heads up, it is not compatible to us Mac users. I've tried to resurrect an old laptop so I can accurately measure these groups but it isn't working. I'll be mailing this target to one of the US site members so he can run it through that program for me and get correct measurements, I don't think my measurements will be out that much but we'll see.


 
yodave said:
there is no room for error when one shoots single shot 1 hole groups, measured any way your can handle it and it will be one hole, could be slightly larger or slightly smaller then the original bullet diameter which can be explained very simple, no matter the size of your paycheck it always leaves a larger hole on your credit card yet a smaller hole in your bank account depending on the light and angle that you look at said hole
Click to expand...

I've been wondering what the scientific explanation was for how one manages to convert money into noise, kinetic energy, and... holes. Holes.
 
That's exactly what I thought.
You guys don't understand the formula.
And yes, I refer first to you flashman,
as yodave didn't call me dumb, at least not in this thread.

So, this is what I suggest:
Take the formula, calculate an hypothetical group twice:
once for .265" bullet holes and once for a .308" bullet holes.
Subtract the 2 groups and you will see the difference is EXACTLY the difference
between .265" and .308" (and NOT .09" as you flashman said,
nor .0215" as yodave said).
Do it and get back to this thread (I'll give you 10 minutes).

Antagonistic Richard
 
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Dr.Lector said:
That's exactly what I thought.
You guys don't understand the formula.
And yes, I refer first to you flashman,
as yodave didn't call me dumb, at least not in this thread.

So, this is what I suggest:
Take the formula, calculate an hypothetical group twice:
once for .265" bullet holes and once for a .308" bullet holes.
Subtract the 2 groups and you will see the difference is EXACTLY the difference
between .265" and .308" (and NOT .09" as you flashman said, nor .0215" as yodave said).
Do it and get back to this thread (I'll give you 10 minutes).
Click to expand...

0.043.................now go away...........
 
Dr.Lector said:
That's exactly what I thought.
You guys don't understand the formula.
And yes, I refer first to you flashman,
as yodave didn't call me dumb, at least not in this thread.

So, this is what I suggest:
Take the formula, calculate an hypothetical group twice:
once for .265" bullet holes and once for a .308" bullet holes.
Subtract the 2 groups and you will see the difference is EXACTLY the difference
between .265" and .308" (and NOT .09" as you flashman said, nor .0215" as yodave said).
Do it and get back to this thread (I'll give you 10 minutes).
Click to expand...

Jeebus. No, you nut, you're right. I was just being needlessly antagonistic, like you were. It's called mirroring. It's not a .086" error, it's indeed .043" Congrats for being able to point it out in a pointlessly abrasive manner when we're trying to have a polite discussion.
 
22forever said:
Flashman, I'm not being rude to you here :d but I have a target your method won't work on I believe. Pic #2. This is a five shot group at 50 metres, 22 calibre. The group measures .277", how do I get the outside edge to inside edge on this?:p
Click to expand...

You, go away - you're in a league of your own. Much like approaching the speed of light, normal rules do not apply when you shoot like that. Impressive stuff.
 
Oh, I have lots of small groups. I said that because my enjoyment in LR shooting is now concentrated in distance hits as opposed to shrinking "group" sizes at anything less than 500m.

Now flame away ....
 
6MT said:
Oh, I have lots of small groups. I said that because my enjoyment in LR shooting is now concentrated in distance hits as opposed to shrinking "group" sizes at anything less than 500m.

Now flame away ....
Click to expand...

No need... JP.
 
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