keeping track and measuring groups

[send it_hit]

how do you measure groupings? what info do you record?

i usually measure, and record ammunition, grain, distance... sometimes general weather conditions (nothing like windspeed etc.)

what is the "standard" info to record for groups? and what is helpful info to keep track of?

[RugerNo1]

I use ontarget software and record as much data as I can like: Wind(speed, direction, etc.), temperature, barometric pressure, distance, elevation, load (bullet, seating depth or jump/jam to lands, velocity, charge weights, primer, brass).

A good notebook is your friend. Check out BigBamBoo's sticky called "How to make your own rangebook" in the centerfire section.

[9mmepiphany]

The easiest way to measure groups in by measuring to the two furthest points and subtracting the bullet diameter...this gives you the center-to-center group size

The important things to track are group size, distance and load...also rate you were shooting. Somewhat useful information is where in your string of fire the group came from (how many rounds in)

[I have a gub]

Yeah but!

Measuring the farthest point from one to the nearest point of the other gives you centers.....but without the math.

[jonzer77]

Measuring the farthest point from one to the nearest point of the other gives you centers.....but without the math.

Sorry to thread jack but I like the user name, I have a Gub. I work at a bank and in training they told us half the time there is a robbery with a note, that is exactly how gun is spelled lol.

[send it_hit]

thanks everyone!

[send it_hit]

A good notebook is your friend. Check out BigBamBoo's sticky called "How to make your own rangebook" in the centerfire section.

Unfortunately the link in that sticky no longer works but I do have a better idea of what to keep track of. Thanks again.

[RugerNo1]

Here you go. To get started.

[RugerNo1]

And some more.

[send it_hit]

oh thats perfect! thanks ruger