haved owned hundreds(?) of rifles in the last 43 yrs., and have owned the hk 270,300, 630 and 940 at one time...
i am thinking the the most accurate rifle i have ever owned was the hk 300..i dont remember what 3-9x scope was on it, but am pretty sure it was a cheapy in the hk factory mount and the ammo i shot was a winchester 40gr lead...3 shots at 50 yds equaled one hole that looked like it came out of a .243..dont think i ever had a jam in that gun either..