Thread: Ultimate compact rifle & catrige - 6mmGT/22GT in howa mini action

Originally Posted by Pommy

The Mini comes in 450 Bushmaster. That's based off of the 284 Win case and has the same .473 head. So it'll have a 308 bolt face.

That said, the bushmater has a pressure limit of 38,000psi which will limit the bolt thrust. I suspect there's a good reason that the engineers at Howa haven't chambered the mini in any high pressure 308 bolt faced cartridges like 6BR (other than the mag length being an obvious limitation).

Very good point there Pommy. the sammi pressure for 6mmGT is 62000PSI. However, I think howa mini can handle it fine. The custom rifle the guy built used BAT bumblebee action, which is aluminium. I am pretty sure mini is stronger than that. I didn't know there is mini for 450bushmaster, looks the mini family are expending