I agree with Flags, Nosler Partitions are hard to beat, but find out what shoots best in your gun before buying a truck load of them. I have a 6MM Rem. which use the same bullets as the .243 Win., except ammo is next to impossible to find for the 6MM. So I reload and use the 100 Gr. Partitions! For factory loads you can't beat the 100 Gr. Core-Loct's.