Well, I don't know yet quite honestly Hondo, as I have a PF bolt face on the way from Zermatt.
The PF M70 feeds great and the McWalnut Origin feeds great from AICS mags with a PF bolt face. The CRF bolt face works fine if you run it fast, but the PF is a bit smoother feeding for whatever that's worth.
Thanks. I didn’t even realize Zermatt was providing push feed bolt heads. I’ll have to look into them.
John