When I started using the .243, I used several different bullets. One for crows,one for turkeys, one for deer.....But after a while I got lazy. I now only use the 100gr. Sierra SBT over 49.5grs Retumbo, Lapua case and Fed 210 primer. This bullet has worked very well for me on deer. It does well on yotes as well, just don't expect fur friendly.
If you try to duplicate this load, the bullet needs to be seated way out. It works well in my Savage but not in my Remington.
John