Thanks.
I don't think either is the case. I kept the 3.34 max OAL down to 3.33 and these hunting loads were all with brand new Sig brass.
I will use RuralRugers approach and try to figure out the cause. I'm happy with the sub minute accuracy.
I was going to try shooting it today and just finished putting together 4 inert rounds which I cycled with the same result.
Tomorrow will be a range day before I disassemble the rifle.
Thanks guys for suggestions and possible causes.