Headspace and OAL of brass unchanged after firing?

[burborg]

So I had some interesting results with the Starline brass I've been working with for 6.5 CM. I measured the headspace (0.400 gauge) and OAL of the new brass before sizing. It FL sized easily with the die touching the shellholder, and the dimensions didn't change after sizing. I didn't see that as much of an issue.

Last night, I was inspecting the headspace and OAL of the now once fired brass. To my surprise, the dimensions were the same as the unfired brass.

I'm sure someone is going to want to mention springback and a tight chamber, and I agree.

I'm just trying to think of potential drawbacks. I can't think of any problems this will cause as long as I keep my cases clean. I live in Alaska, so 90 or 100 degree days aren't much of an issue. It's a bolt action hunting rifle, so I'm not really concerned about issues it might pose for high volume, rapid shooting sessions.

Are there any other potential issues I'm not considering?

 

[WeiserBucks]

Eventually they'll need to be sized and it doesn't sound like your die is going to be able to do it.

 

[burborg]

Eventually they'll need to be sized and it doesn't sound like your die is going to be able to do it.

Definitely possible, but I can't be 100% certain yet.

 

[TaperPin]

Definitely possible, but I can't be 100% certain yet.

I’ve burned up a number of barrels with the full length die unscrewed half a turn, not pushing the shoulder back at all. The negative effects of less than .00X” of setback are greatly exaggerated. As a teenager I can remember reading gun writers claim your hunting rifle will jamb up with slightest debris or changes in temperature if only neck sized, yet it never happened. Nowadays an easy chambering round with pushed back shoulder is thought to be more accurate because the rifle doesn’t move around when chambering another cartridge, but for hunting purposes I don’t see it on target. Straighter walled cases probably have more issues, but I have yet to see it with my Creedmoors.