youre within good kill range for 100yrds...I will say though if you experiment maybe with some different loads or even just a higher quality factory load you'll get a better grouping...especially with the 243....

My Rem 700 in .270 with factory trigger really likes the 130gr Hornady SP factory loads and the Federal Premium loads as well...I played with a few different factory rounds and was happiest with these for both grouping and hunting loads...My 243 seems to favor the Fusion stuff...Most grouping 1" or under...