Finding seating depth in Rem. 7600 and HK 770 308's.... joy

[Carphunter]

Damn. I've never had this much fun finding the depth to rifling in my rifles.

My 7600 was just miserable... I think it's got a deep throat... but  it's got a burr either in the throat, or in the lead of the rifling. 

770... well, any gun that slams shut like they do doesn't give you much finesse to find the depth measurement.

In the end, I think the 7600 is about 2.23 to the rifling, while the 770 is 2.13. 

I did find out too, though, that it's not worth loading the 770 longer than 2.8 oal because if you have to unload it, it doesn't want to eject shells longer than that.

blah

[kyote]

The HK 630 is the same.I load to fit the mag and have reliability in the feeding.he he he yea the chamber is the sizing die on them things..

[Carphunter]

After all my dicking around trying to find seating depths yesterday, I pretty much had to build the bullets even more conservatively...that is I backed off quite a bit from where I thought the seating depth was and paid more attention to making sure I had around 1 bullet diameter into the case.  With the boattails I'm using that meant making oal 2.75 bullets that were approximately .053 off the lands.

We'll see how they work.