I've owned three RR 700s and must have had the only three that didn't have any issues with primary extraction. I've heard about it but never seen or experienced the issue. I thought the RR guns were well made and timed the way they ought to be. No issues with mine except one: my 700 BDL in .270 would leave a nasty scratch on the spent cases. I bought a flex-hone and oil and solved that issue easily.

[Linked Image from i.imgur.com]
https://vcdl.org/