04-24-2020, 08:37 PM
This is nothing new. Run a search and find out everything you want to know about sizing and using 7.62 X 39 brass for the Grendel.
You will get the following.
10% loss of brass sizing it down.
Must fireform after sizing down.
Will get two or three more shots before the primer pocket opens up.
Velocities will be lower, no matter what Large Rifle Primer you use.
We did it because there was no Grendel brass available, sometimes for five or six months straight.
With Hornady and other companies making real Grendel brass, using 7.62 X 39 brass is a waste of time and effort.
LR55
You will get the following.
10% loss of brass sizing it down.
Must fireform after sizing down.
Will get two or three more shots before the primer pocket opens up.
Velocities will be lower, no matter what Large Rifle Primer you use.
We did it because there was no Grendel brass available, sometimes for five or six months straight.
With Hornady and other companies making real Grendel brass, using 7.62 X 39 brass is a waste of time and effort.
LR55