Hi! I'm looking for a .303 winning load or loads.. My tricks:

- Sort any brass by brand , weight and rim tickness. Weight variation admitted: 0.5 grain.
Not use PRVI brass: i checked standard deviations usinga cronograph , PRVI brass produces higher standard deviation because has got a larger flash hole. If you have headspace problems , try another bolt head.

- Primer : .303 Britishicon brass has a conical shape , here works better federal premium instead bench rest primers.

- Bullet: i have only 4 and 5 grooves rifles, so Sierra hpbt 174 grainer works fine. But does something work better?


-Powder : i use N140. What you use?

Last thing: chamber are larger than modern civilian rifes. After 4 or 5 shots brass isn't symmetrical so i mark it with felt pen in a way i could chamber reeloaded ammonition at the same way each time i fire.

What can i do to get better results?
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