comparing the three X-Bullets and load data

[gunilla]

Dear experienced reloaders !

(please excuse my poor english)

Barnes recommends the same loading data for the TSX and the MRX, but they are of different size (length) which results in different space within the case, as the bullets are all set with the same die (1.3 mm before the barrel).

from left to right: TSX, T-TSX, MRX

Taking the recommended powder and charge from the Barnes book or website:

.30-06 Springfield
180 grains TSX, MRX
powder: IMR 4064, Minimum 44.5 grains, Maximum 48.9 grains.

and using those values in Quickload, results the following:

44.5 grains =

87.8 % charge for the TSX
90.8 % charge for the T-TSX (makes sense as the bullet is the largest and thus sits deeper in the case)
87.2 % charge for the MRX (makes also sense, as it is the shortest)

So the recommended minimum powder charge is below 90% density.

Can I rely on QuickLoad ?

If anybody could give an orientation would be highly appreciated.

Thanks in advance and regards,

gunilla