I suspect that he is recommending that you have more bullet than you need as insurance. That being said the 130 gr SST is just fine. I shoot 130 gr Ballistic Tips out of my 270 WSM for PA deer at ranges of 40 to 200 yds. Have not had a single one run off, dead right there performance. That 130 gr SST is adequate to take any thin skinned game on this continent just as the 243 is as well. Are there better tools for the job, of course do you need them, probably not. Take what you are comfortable with.