If I wasnt a great shot I Would prolly go with the 300 but since you can shoot both well then definetly the 243. It will do its part for sure. Ive also had more drop dedders with my 6mm than with my 7mm saum. Never have figured that one out. I might would take both of them along and use the 300 over fields and carry the 243 in thw woods but thats just me.