xausa, I own a Brno 602 action which has been converted to 500 Jeffrey. It took my gunsmith 3 goes at getting the feed just so. Now it just plain works from a staggered column. Mine holds 4 down plus 1. Not bad for those big fat cartridges.

Don't be despondent should the thing not be perfect first up, they normally feed quite well with some work. Once their done their done forever.