Doug Bowser said:
I attended an accurate rifle clinic at the NRA Convention in San Antonio, TX in 1979. The teacher was Creighton Audette. He said the most important parts of accurate ammo was the bullet and that the cartridge is concentric. The powder charge does not have to be exact. If the powder charge is within .4 grains it will perform. Mr. Audette was a member and the adjutant of the US Palma Rifle Team. In other words perfect powder charges are a waste of time to his idea.
For me, I've found that it indeed makes a difference for my super anal 600 yard match ammo.
I can find just as many reloaders who will tell you that bullet sorting, and case concentricity is not that big a factor.
I'm about to start getting anal on case concentricity as well.
For me, its a mental thing...I want to know how much powder is in that case...so I throw low and trickle up.
There are many ways one can make less than a pefect reload...some only care about Minute of deer accuracy..some may desire 5 shots in the same hole...
Time is a "realtive" thing...we all get to choose how we spend it...some view reloading as a chore...I view it as a learning opportunity...and I have much more to learn to improve my "process"......
My point is...I don't think its possible to find a mechanical or digital thrower that will throw consistently each time...I sure have not found one....no matter what powder I use....so I trickle...problem solved...I'm only loading small batches of "precision" match ammo at a time...say 100 rounds...so its really not a big deal...
Based on a survey on 6mm BR a lot of Benchrest shooters do the same...whether or not it really matters is highly debateable.