Why do you say the 300 grain sabot is best? What bullet brand(s) are you referring to? I love my TC Omega, but I asure you it will perform very well with lighter Precision Rifle sabots and have plenty of kinetic energy with even 90 grains of 777 to do the job on deer. Now, if you are going after elk, then that is different. I have recorded 1/2 inch groups with the .357 175 grain bullets using 105 grains of 777 ffg at 100 yards. The deer I shot with it this year was dispatched quite nicely also. I must confess I have a .45 so I am somewhat limited in weights, but I also assure you that the .50 caliber will perform equally well with the DUPLEX .357 195 grain Dead Center. I will now step down off my soap box.