Hi , after seeing several posts about how accurate certain calibres are (i.e. 6mm br) I would like to ask what makes certain calibres more accurate than others ?
thanks , Connor
thanks , Connor
No mate , it has a large oneHas the 6.5x284 got a small primer
Mundane practicalities......[that] contribute to more uniform internal ballistics.
• Short, fat powder-column
• A 30/40 degree shoulder-angle
• Generally a long case-neck
worth noting there are some out there that are very accurate cartridges that defy the properties above
long case
short neck
I don't understand why the properties of the cartridge should have any influence at all on accuracy once the bullet has entered the barrel and engaged with the rifling? Surely any variation potentially introduced by the cartridge is entirely negated by the influence of barrel characteristics?
I'm going to hazard a guess that many of these more exotic bench rest cartridges are perceived as more accurate simply because they tend to be fired by extremely meticulous (obsessive?) people using very finely tuned rifles and loads under optimal conditions. Whereas the more mundane, every day cartridges are fired in factory rifles, using factory loads, in less than ideal conditions by people who (often) aren't that bothered about utter precision accuracy.
You take 2 identicle actions to a rifle builder and get him to rebarrel one in 6mmBR and one in your choice of mainstream calibre with the same make barrel and then go and do some load development, then come back and tell me the 6mmBR didn't pi*s rings around the other one.
You take 2 identical actions to a rifle builder and get him to rebarrel one in 6mmBR and one in your choice of mainstream calibre with the same make barrel and then go and do some load development, then come back and tell me the 6mmBR didn't pi*s rings around the other one.
http://www.6mmbr.com/6ppc.html is worth a read.
JCS