My .243 will shoot the 85 grain barnes very accurately at very near 3400. I haven't gotten great accuaracy with the 105 hornady bullets, but it gets them over 3000 pretty easily and I plan on spending more time with that bullet to try and get it grouping better. I also picked up a box of 95 grain bergers to try out.

The reason I ask is because I'll be moving to Colorado next month and would eventually like to try for pronghorns. I assumed the .243 would be plenty of gun, just not sure which bullet would be the best. Ballistic calculators show the heavier bullet cheating the wind better than the lighter and faster bullet, but that depends on the accuracy of published ballistic coefficients. The lighter bullet shoots a little flatter at hunting ranges, but that can be compensated for easier than wind.