Help finding node
- Thread starter Mark Watson
- Start date
Agree with Skunkworx, more info needed. You are basically looking for a group of two to three charge weights that have velocities within 5fps of each other (10fps max). That flat spot will most often be your node.
You need more data. Youre basically just shooting in the dark here.
Here is how your partial data looks graphed
Here is how your partial data looks graphed
I think you mean 5 shots per weight. Mo data is mo betta
So where are those targets. And was this with a magneatospeed strapped to the barrel?
I use three at this point in load development. Generally OCW. Tune length, chronograph, 5rd groups at 600y. Not saying I am right, its just what I do.
load development doesn't need to be complicated. Load 2 or 3 rounds of each charge weight. Look for a flat spot where the velocity barely changes between several weights. Somewhere in there will be your node. Go back and load 5 each of the 2-3 charges inside the flat spot and pick whichever one gives you the most consistency. done.
I think the general consensus is that the best areas are around 41.5 and 42.5 +/- .2 grains for 140 grain bullets. Thats what my 700 and RPR like. For overall length, I tend to stick with what the factory ammo length is. Works for me.
Is a node just a velocity that your barrel likes? I do the ladder test on a chrony moving up in .2 gr increments and have had good success picking the middle of the flat spots and then tuning for seating depth. Similar to what ditter said, my middle node is 41.7 and upper is 42.3. BUT, is that because of the velocity of the bullet? I guess my real question is...could I take the velocity that I shoot at 41.7 gr of RL16 with a 143 gr eld-x (2745 FPS) and then just find the charge that matches it with a 120 gr ballistic tip and still be in a node for my barrel.
I realize that I will be able to hit higher velocities and therefore higher nodes using the 120’s over the 143’s but I’m just curious in theory if a certain velocity for your barrel is a node across a spectrum of bullets and powders.
I realize that I will be able to hit higher velocities and therefore higher nodes using the 120’s over the 143’s but I’m just curious in theory if a certain velocity for your barrel is a node across a spectrum of bullets and powders.
