[Tainan]

Thanks for re-loadin' this thread.

At some point in time I'd like to see a thread discussing ballistic co-efficiency, bullet sectional density as it pertains to trajectory and its relation to the term "inherent accuracy."

I know this sounds like arcane academic bs...but at one point in time an instructor was able to explain this in 'laymans' terms such that it actually made sense and was fairly easy to understand.
If anyone here can do this I'd like to see it. I think it also might be of interest to some who work with trajectory tables and have had a question as to what the term..."Inherent Accuracy" really means.

Thanks!

[PapaBear3625]

At some point in time I'd like to see a thread discussing ballistic co-efficiency, bullet sectional density as it pertains to trajectory and its relation to the term "inherent accuracy."

I'll take a shot at it. 8-)

"Inherent accuracy" has to do with the accuracy of the rifle once you take out the human element(the skill of the shooter). In other words, if you put the rifle into a rigid mechanical holder, and then measured the size of the group on the target, that would be the inherent accuracy.

The ballistic coefficient of a bullet has to do with its ability to overcome air resistance. The higher the BC, the better the bullet will retain velocity. This is important at longer ranges, where a high BC means a flatter trajectory. A flatter trajectory means that you will be less likely to be high or low due to miscalculating the distance to the target, or due to variations in the muzzle velocity from variations in your ammo.

[smokingfrog]

How do bullets fly?

[sig226]

Inernal and external ballistics are good subjects, each worthy of a long thread.

On the subject of inherent accuracy, 6mm bullets seem to have the best potential. I learned this from benchrest shooters who went to tremendous efforts to assemble 6mm PPC cartridges that would shoot five shoot groups .001” tighter than the next guy. I’ve never heard an explanation for it, but I have noticed that 6mm rifles tend to be extremely accurate The bullet diameter is the common factor.

They’re doing remarkable things with .308s, but I think the 6mm will remain the best, perhaps only because extended range sessions are a little easier on the shoulder with the 6mm guns.