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6MM GT

New drawing Coming

Introduced in 2019, the 6mm GT is yet another in what seems to be an ever-growing, perhaps endless, list of specialized target-chamberings based on either the BR (30-06 base-diameter) or the PPC (7.62×39mm base-diameter) case. This one uses the former and sits between the 6mm Dasher and the 6mm XC in terms of capacity. It would be impossible for those not intimately involved in the competitive target events for which these are designed to understand why any one of these might have an edge over any other similar chambering. The issue is getting precisely the right capacity to do what needs to be done by launching the best bullet at the best velocity with the best ballistic uniformity with the components available.

As far as the cartridge is concerned, accuracy is a function of case, bullet, primer, and propellant quality. Assuming all are comparable, no specific otherwise-similar design should have any advantage over any other. So, as noted in the preceding paragraph, it is a matter of finding the ideal capacity for the available components to do what needs done with those.


As component selection changes, the ideal design can change.

Heritage of this case dates to the 1870s with the introduction of the 40-70 Ballard case.


The text associated with the cartridge description reflects opinions and conclusions of the author, M.L. (Mic) McPherson. Lee Precision and its employees do not necessarily either agree or disagree with any of his comments. We present these with due deference to his recognized expertise in the firearms field. His acumen extends to handloading and all aspects of ballistics - internal, external, and terminal.
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