My best results have always been with the .311" 174g Sierra Match King in Lapua brass and 4064 but here you get close to $1 for the first shot but what price do you put on accuracy? I don't spend all day running 300 rounds through the rifles week after week. I take my shots to verify and move on. If I can get MOAH at 500 yards I'm a happy camper. After that the factory 10 yellow tip heavy ball but it is magnetic glided jacket is very good to and past 300 meters, just my observation nothing written in stone just works in my rifles. I have never used the spam-can light ball in my rifles but use the 150g Sierra Game King and 4895 with good results and as a bonus the same components work in my Enfields. All this is subjective and your mileage may vary.. I am not an expert on anything these are just my observations. Good luck and please report you results.
"Own only what you can carry with you; know language, know countries,
know people. Let your memory be your travel bag."
- Alexander Solzhenitsyn