10-19-2018, 01:23 AM
bob4432 Wrote:Rifle is not done yet, need a barrel and optic (will be using LaRue triggers - being on a budget, how can I not use them?) and I do not reload yet, but I appreciate the suggestions. Once reloading equipment acquired available and I get reloading setup setup and get some confidence under my belt, I will be trying A LOT of stuff. Will have a lot of LC5.56 & PPU brass on hand, sadly at this time, I am going off Google Earth for the elevations for where I will be shooting the most of the time.
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I do have a question for the horde that is OFF TOPIC - this is just a general question that did not make sense to me and I am hoping somebody can explain the rationale behind a comment I recently read - I was reading about the 6.5x47Lapua vs 6.5Creedmoor. The righter stated that he felt that the 6.5x47Lapua was more accurate than the 6.5Creedmoor because of the brass, and he alluded that the 6.5x47Lapua was more accurate because of the brass. This does not make sense to me because you can get 6.5Creedmoor in brass from Lapua. I have not studied the brass designs but is this author stating that the could be the reason? I believe 6.5Creedmoor was first made by Hornady, so would Lapua make their 6.5Creedmoor brass just a bit inferior in some way - possibly at the chemical level? Also, I need to add that these were match quality firearms we are talking about. As I learn, the only thing that would really stand out would be the cambering, but being these were the highest quality (if memory servers me) Krieger Barrels, or possible Lilja, Shilen? (not talking about B-Tac from Brownells or the $200 BA, Faxon, etc). These rifles were the type that are done by hand, chambered so the bolt is known to the barrel which is known to the ammo maker (possibly even firearms that that Lapua and Hornady would use in competition - did I just answer my own question - a Hornady firearm is going to use Hornady ammo, and therefore Hornady brass...I don't know but I am at a loss for an answer unless that was it). If anybody could shed any light on this I would greatly appreciate it.
Bob
Bob:
Arguments over the 6.5 X 47 vs 6.5 Creedmoor vs the .260, and even the 6.5 / 08 are as useful as arguing over the viability of the 5.56 as a service round. Performance will be identical given a quality rifle and quality shooter. Differences in velocity are there but are not so great that one would be better than the others. Lapua brass has a reputation for being the best quality made. Hornady brass doesn't last as long which means it probably isn't as good. I am not sure how that plays into performance, though.
The 6.5 X 47 uses a small rifle primer and the Hornady brass a large primer. That has the potential of making a difference because the small primed brass can take more pressure without blowing a primer or ruining the brass. Many people will also say that a small primer pocket in the .308 size cases does give more consistency than large primer cases. I believe it.
I am not sure what you are getting at when it comes to rifles and the brass they use. A custom rifle in 6.5 Creedmoor takes 6.5 Creedmoor brass. Doesn't matter if the brass is made by Lake City or Lapua. Normally what does matter is the bullet a guy uses. Chambers like the 6.5 PRC are throated for that 143 grain bullet that Sticks mentions. Not that they won't take other bullet types and probably shoot them just as well. Just that the throat is cut in length and probably tapered for that specific bullet. Generally the throat is long enough that the bullet seats in the brass so that the boattail is just below the neck. Probably cut so when chambered, the ogive of the bullet is just off the lands. The cartridge must also fit a magazine.
Anyway, that is a pretty basic answer.
LR55