Choosing a primer

[DRNewcomb]

If I were to load a number of rounds with small rifle primers and an equal number with small BR rifle primers, should I expect to see a significant difference in accuracy~?

Do you dump or meticulously weigh your charges? What's your case prep procedure? Whose bullets are you using? What range are you shooting and what do you consider significant? "BR" means "bench rest" and if you are not used to shooting inside one MOA, I wouldn't bother.

 

[Surgeonwithagun]

There have been published tests on this question as I recall. The differences were small to none. Different rifle primers can also have differing cup thicknesses, so they may not ignite reliably in every rifle.

John

 

[Dave M.]

If I were to load a number of rounds with small rifle primers and an equal number with small BR rifle primers, should I expect to see a significant difference in accuracy~?

Not every load in every rifle will show a difference. Some will and some won’t. You cannot say with a blanket statement that in every case it will or won’t have an effect.