Case variations and accuracy

[spikehunter]

With everything being equal how much variation or changes in accuracy would you expect from interchanging brass manufactures. So the same load but maybe federal vs Remington brass for example. Just something I have always wondered. I would not want to sight in with one, switch to another and have it be off target.

[LngRngShtr]

Some rifles care, some don't  load some and set 2 targets to compare,

 

Physically the internal dimensions would possibly be different changing the size of the combustion chamber  which could effect the pressure generated and/or velocity   which can change group size or point of impact

 

depending on range and target size this may not be that big of a deal to a competitor trying to hold 10 ring or a prairie dog shooter @ 200yds.+  = big deal

 

a Deer at 40 yds.  not so much..

 

So some more info is needed, the capabilities of the rifle as currently loaded, the shooters ability, the target size and distances to target may be more of a variable than the difference of the brass.

 

My M1,AR, and M1917 don't care as long as the same ammo for the session is used, I have special prepped brass for my 1903A4 but more because an old warrior like that has earned it more than being picky..

 

Handguns my 1911s in 10mm,.45, and .38 Super don't care but my S&W M-52 wad cutter gun will show a difference in POI and group size but only after you get out beyond 25 yds. FROM A REST  offhand as intended to be fired I am more a variable then the ammo

 

John