6.5 Grendel PTG Reamer

[Tedward]

Here is what I've seen with my barrel:
Before shooting I cleaned the barrel. The factory A-Max appeared to chamber normally, with the bolt closing easily in the competed upper.
After firing I did check OAL on my factory rounds and they are at 2.245". Carefully chambering one leaves light marks from the lands. Cleaned barrel.
After firing my hand loads a factory round still has land markings but they look a bit lighter than initially seen. This may be from smoothing out the lands as a normal result of breaking in the barrel.

Great info, that is what I was looking for. I'm seeing the same thing but wanted another person to post there findings. If people would do the same measuring before and after, we might just determine it is a brake in process needed for a Grendel Chamber that is not hand lapped. Yes other calibers might not need this due to there throat geometry but this is a Grendel and it is unique.