want to see a rifle go "out of tune"

[ar10ar15man]

so the rifle is a 6mm dasher used in 600/1000 yd br
rl 15 cci 450 lapua cases barts 105
the group on the left is my current competition load
0.167 with less than 20 thou vertical
the next three "groups" are each 0.1 gr up in powder(+.1.+.2,+.3)
there was a slight right to left breeze.
notice how they grow in VERTICAL...THE HARMONICS/the tune going away.
that is tune going away. i could keep adding powder till it comes back..if it does before i max out.
i actually like the node i am at, there is one lower.

 

[Gwine]

That's cool. My shooting is no where near that good, but I just walked into a node.
Last weekend I went to load some ammo for the 223. I have about 50 left from a few years ago and couldn't find my notes. I knew it was 22.? So I loaded (3) each @ 22,22.3,22.6 . I started bottom left on clean barrel with old load first shot fouler. (hole under ?) Shot round robin.

I later found my notes and my old load was 22.8
[100yds, 16" AR, 7 power scope, crappy trigger]

 

[Don A Parsons]

My friend was at the range last weekend finding the Velocity node only,,, he likes to find the sweet spot where the least amount of fps changes happen before he dose the ladder test...

This idea won him the Western Canada final 2 years ago if I recall...

So the least spread in Velocity difference,,, then the tuning fork barrel next,,, he makes it look so easy...

Our group gives him credit for a few things,,, his ammo prep and details to perfection are through the roof... Lots of details need to line up in his brass preparation...

I only hope I can match his skills when I was young... LOL

 

[slv hunter]

That's why we have scales that can measure 0.10g or even better, not 0.30g
Thanks for sharing

 

[ar10ar15man]

this was done with a .02 scale a&d fx120i

That's why we have scales that can measure 0.10g or even better, not 0.30g
Thanks for sharing

 

[slv hunter]

Yeah I own an A&D myself. I was thinking you for showing small increments in powder change are as important as seating depth and all the other things we do to tune a load. Earlier on another post the fairly new guy didn't realize this.

 

[ar10ar15man]

so do not yell at me, but this statement is very misleading.
"0.10" is not what it appears. the zero on the end adds value, value not seen in reloading.
a typical rcbs beam scale is .1 plus or minus .1, so 45.3 can be 45.2 to 45.4.
an a&d fx120i is plus or minus .02, so 45.30 can be 45.32 to 45.28. a much finer tolerance than a beam.
the next step up is a 0.01 scale for 45.3 is 45.31 to 45.29, even finer than the 120i. this jump in precision doubles or more the cost of the scale. $1500 or more.
to get to x.x0 requires a scale that is in the 0.00x range, not gona happen in the world of reloading.

That's why we have scales that can measure 0.10g or even better, not 0.30g
Thanks for sharing

 

[Zen Archery]

Good edu. Tool!

 

[Canhunter35]

Great pic, I'll add another to affirm a good way to build a load at 100yds

3 shots at 40,40.5,41gr of varget behind a 208eldm in a 11.25tw 308

 

[Aimsmall]

so do not yell at me, but this statement is very misleading.
"0.10" is not what it appears. the zero on the end adds value, value not seen in reloading.
a typical rcbs beam scale is .1 plus or minus .1, so 45.3 can be 45.2 to 45.4.
an a&d fx120i is plus or minus .02, so 45.30 can be 45.32 to 45.28. a much finer tolerance than a beam.
the next step up is a 0.01 scale for 45.3 is 45.31 to 45.29, even finer than the 120i. this jump in precision doubles or more the cost of the scale. $1500 or more.
to get to x.x0 requires a scale that is in the 0.00x range, not gona happen in the world of reloading.

A number of years ago I broke down and purchased the a&d fx120 with auto trickled. Best $750 that I ever spent. I wish I could have back all the money I spent on crap scales and the decades of Chinese water torture. A variance of .01 is remarkably different than .2 variance. Now if my eyes were just 40 years younger....

 

[26Reload]

My rcbs 10/10 scale does measure .01 increments....and didnt cost several hundred bucks.....my new rcbs electronic does not measure .01..it measures .1.....which I don't really like about it....
But you can also get a hospital scale or a pharmacist scale to go to .001 weights......

 

[Remmy700]

My 300 WM hunting rig. This was initial load work to basically break barrel in and find some pressure, and for me to get comfortable with the setup. It basically continued this same pattern all the way up to around 78.2. Nodes were only around .1-.2 gr wide.

 

[HobieH3]

so do not yell at me, but this statement is very misleading.
"0.10" is not what it appears. the zero on the end adds value, value not seen in reloading.
a typical rcbs beam scale is .1 plus or minus .1, so 45.3 can be 45.2 to 45.4.
an a&d fx120i is plus or minus .02, so 45.30 can be 45.32 to 45.28. a much finer tolerance than a beam.
the next step up is a 0.01 scale for 45.3 is 45.31 to 45.29, even finer than the 120i. this jump in precision doubles or more the cost of the scale. $1500 or more.
to get to x.x0 requires a scale that is in the 0.00x range, not gona happen in the world of reloading.

Significant figures!

 

[Remmy700]

so do not yell at me, but this statement is very misleading.
"0.10" is not what it appears. the zero on the end adds value, value not seen in reloading.
a typical rcbs beam scale is .1 plus or minus .1, so 45.3 can be 45.2 to 45.4.
an a&d fx120i is plus or minus .02, so 45.30 can be 45.32 to 45.28. a much finer tolerance than a beam.
the next step up is a 0.01 scale for 45.3 is 45.31 to 45.29, even finer than the 120i. this jump in precision doubles or more the cost of the scale. $1500 or more.
to get to x.x0 requires a scale that is in the 0.00x range, not gona happen in the world of reloading.

When you see these numbers in front of you really puts things into perspective. A variance of .1 which is what many dispenser/scale setups like hornady, chargemaster are is huge. You are talking depending on what powder you a running around 6-8 kernels which in some powders can be as much 2-3 FPS per kernel. When you step into something like .02 now your loads are within a kernel on each charge, and you have the resolution to see the weight of each kernel as it falls. The .01 is to the point where you can cut kernels and see the weight, insane!