I was hoping to avoid this going into the "Must Weight" versus "Weighting Not Needed" camps but I guess it was inevitable. That said:
- I have seen data that showed that weighting to the tenth of a grain had no impact on accuracy.
- I have not seen data that showed by weighing to the tenth of a grain has an impact on accuracy, but I always have an open mind and willing to learn.
My focus has been on whether mold/alloy temperature has an impact on bullet drop weight. After the last 6 or so casting sessions I'm close to saying that there is data that supports that a mold at x temperature will yield a bullet heavier or lighter than a mold at y temperature.
Once I understand the effect of mold/alloy temperature there will be 10 shot groups shot with like "light" bullets, 10 shot groups shot with "heavy" bullets and 10 shot groups shot with a mix match of heavy/light bullets. My expectations for finding anything different than what others have found is not that high. In other words, that a few tenths of a thousands ("few" defined by the user) has no effect on accuracy.
What I am interested in seeing is 10 shot groups shot with bullets coming from the same mold temperature. Which if found to be a positive effect on accuracy will create an aura of magic/mystery around the metallurgical fusion of of the cast alloy at x temperature. Understanding that is way above my pay scale.
Thanks, Bill Cook (obviously retired, A+ personality and it appears that I have too much time on my hands)
PS: To keep this into perspective: "Accuracy requires the user to be using match grade casting, reloading and bench equipment and match grade casting, reloading and bench practices".
A “Measured Response” is as effective as tongue lashing a stuck door.