I have read some threads about the best bullet for varmints in 6mm and they are usually lighter grains, anywhere from 60-80 grains. i am running a 6xc with 8 twist barrel and would like something a little heavier that will still fragment well. I see that the berger varmints stop around 80 grains and are flat based, is there a reason they go to a flat base? Also all hunting bullets in the 85-108 range seem to be tuned towards deer or larger game, would they still work well for varmint. Would i be better off with a tipped bullet to help with expansion or would the hollow points do plenty well at 2800-3000 fps. I currently have berger 105VLDH and sierra 90 TGK to load with. Thanks in advance for any opinions, i am relatively new to reloading and it was easier when you just went to the counter and grabbed something labeled for varmint and didnt worry about twist rate, velocity, and weight. although i think i will be much happier being able to tune ammo to exactly whatever i want.