I have a Apollo lite ti, Kratos Lite ti and a helios, the Kratos predecessor. The Apollo was using aics 300wsm mags in a chassis. I also have a couple of Joel's billet mags to use in the Hawkins hunter M5 dbm setup. Rifle originally was 25 sst, the billet mags did NOT feed at all due to the aggressive nature of the Sherman geometry, however the aics......fed like butter. The action now wears a 65 saum barrel. Just picked it up from getting bedded last night, I installed the Hawkins bdl and wyatt's cfe5 box. With some minor tweaking and mods to the cfe box, it's feeding excellent. It's scraping up thr cases pretty badly so I'll polish up the lips some.
The helios is a 338 rum opened up for cfe9 box, tuned by Whaley Precision when he built it. It's the smoothest feeding action I have. It's serial number 00007.
Last year I acquired the Kratos Lite and Apollo. The Kratos is 7/300prc, utilizing a wyatt's 300prc box/follower and feeds off the lips fine. I however will likely swap this to a wyatt's cfe12 box as I MUCH prefer center feed design. Plus with the Hawkins M5 oberndorf bottom metal I'll still be able to run 3 down in the mag. But maybe the prc can do that anyway with its non rebated design.