Load data from Berger for 6.5G

[LRRPF52]

In a non-standard chamber advertised as SAAMI 6.5 Grendel but really with conventional freebore and a 1.5 degree leade, those pressures will decrease assuming all other things are equal (big assumption).

Using a freebore like that doesn’t really help us out though since the magazine restricts us to 2.260” COL in many cases, but it helps out a company wanting to crank out barrels with as much reamer wear as possible and still staying away from short chambers.

We ordered a very specific reamer from Manson, a true 6.5 Grendel with compound throat, but then had it set to a reamer dimension that would be common halfway through the reamer’s life, instead of a fresh and new reamer that would be on one end of the spectrum and not very representative of all the SAAMI chambers.

If you dropped that reamer into most of the chambers on the market, I doubt you would be able to remove much material. On my own Manson reamer, I have cleaned up some short throats before with it, but they had lands that were jamming factory and less than 2.260” COL common projectiles.