Anybody that needs any info on this caliber, here it is. i tested my winchester model 70 243 wssm 22inch barrel. the gun shot good with h 414, and h 380. but varget was the best! it was cutting holes at 100 yards using 35.5 grains. after about 20 shots i would say my grouping was less then 1/2 of an inch. i was really impressed with this caliber!!!!