Re: XPB and TSX
Posted: Mon Oct 31, 2016 5:59 pm
pitted bore wrote:Barnes messed up their website listing of their 451 pointy bullets. This may perhaps be contributing to some confusion.
Here's an image that is a composite of the bullet images and information supplied for the TSX-450B bullet and for the XPB-460 S&W bullet.
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Notice that the Sectional Density (S.D.) is the same for the 275-grain TSX and the 200-grain XPB. This is incorrect. All 275-grain bullet of .451 diameter have the same sectional density. It appears that whoever inserted the data for the TSX bullet copied the S.D. and B.C. values from the 200-grain XPB bullet.
As a guess, the Ballistic Coefficient values for the 275-grain bullets will be almost identical.
A minor problem is that the S.D. and B.C. errors supplied by Barnes for the TSX bullet will propagate through product listings for vendors of the TSX bullet. This is already the case of the listing on Midway's website, which shows the TSX with the incorrect S.D. and B.C. values.
--Bob