you can polish a bevel on the extractor ,i have don this on a m98,but if you are not careful $#%#!. i would listen to the smith at cz.
i did a mod on one of my clips for my 527 hornet ,i took .110 off the plastic spacer at the back of the clip and made another feed follower ,and can run bullets to the lands with no problems. i like the hornady 45 gr hornet ,it has the best bc. and the best long range accuracy ,the v max 35 and 40 grn bullets work well to 100 yrds,but fall short past that for me.
this clip mod is not hard to do ,you can find info on this mod online.