How often does your SD change?

[BenPerfected]

My SD erodes in my 6 Dasher barrels about .001 every 75 rounds. I’m now checking my SD every 200 rounds....one more mouse turd to trip over.
Ben

 

[243Mendoza]

do you have a record of the changes? Is it changing less and less with more rounds?

 

[Warren Dean]

My SD erodes in my 6 Dasher barrels about .001 every 75 rounds. I’m now checking my SD every 200 rounds....one more mouse turd to trip over.
Ben

So in 7500 rounds, your SD will change .1 fps. That's less than a rounding error in chronograph data. Go practice.

 

[newbieshooter]

My SD erodes in my 6 Dasher barrels about .001 every 75 rounds. I’m now checking my SD every 200 rounds....one more mouse turd to trip over.
Ben

So in 7500 rounds, your SD will change .1 fps. That's less than a rounding error in chronograph data. Go practice.

Oh, I took SD to mean Seating Depth....

 

[kvd]

He does mean seating depth - not standard deviation.

 

[Northridge]

Oh, I took SD to mean Seating Depth....

newbieshooter I think your on the correct wave length Lol. if not I'm on planet mars with you.

Shawn Williams

 

[Warren Dean]

LOL...An F Classer misreading bench rest lingo....disregard, please.

 

[JohnKielly]

That sounds like a lot of erosion.
Is that normal for a Dasher?

The question is, "can you measure this consistently?"