Quotes from 'Bullet Moulds' topic:
-- May I suggest to anyone who weight sorts. Try shooting everything that falls from your mould and looks good, and compare accuracy to your most carefully weigh sorted lots. You probably will never weigh sort again.
Not that Veral needs any support for his ideas on casting from me, but I have run the test he suggests several times shooting alternative groups of bullets from the same lot. One group with uniform weights, one group with both the heavy and light mixed, one with mine run and so on.
I have NEVER been able to see that shooting bullets sorted by weight helped a bit and it often looked like the mine run bullets did a bit better but I have never done statistical analysis on the numbers to see if the difference was significant.
Of course all my tests were on 22 caliber bullets. You thirty caliber types will have to run your own experiments or just take Veral's word for it.
Assuming these 1 grain differences in bullets is a hollow pocket somewhere under the surface of a bullet, it can have drastic affects on accuracy from my point of view, without facts to prove it because there is no way to find an internal void without destroying the bullet for testing. If the void is near the center of mass and/or rotation, then rotational stability is not affected as much as a void just under the surface on the outer diameter of center causing more of an outa balance force in a 1-10” twist speeding bullet at 2,000fps. A 30 caliber bullet over a 22 caliber has about a 28% difference in diameter, 14% in circumference. Diameter forces are greater than ratio to ratio differences between the two bores. That is enough difference for concern for me. So John, that is one advantage you have with yer 22s.................Dan