Originally Posted by Riflecrank
Sir John,

The diameter in the grooves of one of those Barnes TSX 400-gr/.416-cal bullets
that I sized down to .411":

0.395" +/- 0.001" after the sizing down, about same before sizing down, just now confirmed.
Gerard Shultz used to laugh about how much under bore diameter the TSX grooves were.
He said those grooves were cut with a bank of Dremel Tool cutting wheels
after the bullets were hammered out of a piece of copper wire.


Then the depth is enough to accommodate the squeeze.

Thanks.

I've seen how Barnes makes their TSXs they go through 6 form dies with punches. WWll bullet making machines. Then they are automatically go onto a spinning machine and metal cutting wheels one in and cut the grooves.






Last edited by jwp475; 01/23/22.

I got banned on another web site for a debate that happened on this site. That's a first