12-19-2023, 08:44 PM
Each chamber can have a different need as far as pushing back the shoulder.
Is this the first time and first setback setting you have tried for brass for this gun? Did the brass you've resized come from this gun?
Factory brass is typically a bit less than the saami minimum so it will fit in any chamber, but your gun's fired brass could be anywhere from still under, to 0.012 or so over... I had a Grendel barrel that did that once upon a time, a delta of 0.012 from saami re-size to 0.012+.
I had a similar issue as yours in OP for my uintah, but by increasing the setback I resolved it.
I'll confess that I use one set of dies with sufficient setback for all the 6 Arcs I have.
It's IIRC still only about 6 thou.
There's also the thing that some brass can have some spring back, even though you think you did 0.004 it might spring back to about 3 or 2 or whatever.
Is this the first time and first setback setting you have tried for brass for this gun? Did the brass you've resized come from this gun?
Factory brass is typically a bit less than the saami minimum so it will fit in any chamber, but your gun's fired brass could be anywhere from still under, to 0.012 or so over... I had a Grendel barrel that did that once upon a time, a delta of 0.012 from saami re-size to 0.012+.
I had a similar issue as yours in OP for my uintah, but by increasing the setback I resolved it.
I'll confess that I use one set of dies with sufficient setback for all the 6 Arcs I have.
It's IIRC still only about 6 thou.
There's also the thing that some brass can have some spring back, even though you think you did 0.004 it might spring back to about 3 or 2 or whatever.