I have a .50cal stainless Omega and yes the Hornady sabots are difficult to load. The triple seven powder causes another problem with the formation of the crud ring. Personally I did the following after trying multiple breechplug configurations, making the switch to the .25ACP breechplug with small rifle primers and evaluating several powders. I now use Black Mag3 powder 80-110grains max under 300gr. Hornady bullets in Harvester sabots or 295gr. Powerbelt Aerotips or 348gr. Powerbelts. and this is with either the .25ACP conversion or with 209 Remington Primers (Not Federals). I hunt elk. If I was hunting deer I would go with the non-aerotip as expansion with aerotip is not good in deer.