Thread: 6x45 Rem barrel

I totally agree, that little Howa mini action is a great base for many small highly efficient wildcats.

The 7.62x 39 and 6.5 Grendel actions also lend themselves well to tinkering. There are very few mini actions out there as affordable and versatile as these Howas.
before the Howa, getting more grunt from the .223 cartridge by necking up etc was generally a better/cheaper option than hunting down a sako or CZ action suitable to feed often the overlooked 6mm PPC for example. The 6x45 actually runs the same ballistic numbers as the 6mm PPC with 1gr or 2gr less powder with all other variables equal.

My interest has now been sparked in 6x45's cousin, the 6mmTCU which is essentially 6x45 Ackley improved, with its blown out straighter side walls and blown forward 40 deg shoulder it allows a couple of extra grain of powder meaning a gain of 150-200fps in most cases over the 6x45.

Another interesting build would be the 6.5 TCU or 6.5x45 which on paper would match the ballistics of the 6.5 Grendel. This cartridge like the 6mm TCU was developed by the late JD Jones for use in 14- 15" long barrelled Thompson Contender pistols for competition silhouette shooting but was adopted by hunters alike for its very usable velocity, range and knock down power. To get the best from these two variants, you really need either a single shot action or the mag room to load them out long. A Rem 700 or Howa mini with a floor plate could be just the key.
Ive formed and loaded up some dummy rounds of each to show the cartridges in discussion.