6.5x47 Lapua vs 6.5 Creedmoor accuracy nodes
- Thread starter Daimon
- Start date
An accuracy node is directly related to barrel length, if the CM and x47 have the same barrel length then the accuracy node will be the same.
However, two barrels the same length, same caliber, same bullet may have different charge weights. One bullet may have a different acceleration rate but have the same exit velocity. So one may arrive at the muzzle quicker than the other but both exit at the same velocity.
However, two barrels the same length, same caliber, same bullet may have different charge weights. One bullet may have a different acceleration rate but have the same exit velocity. So one may arrive at the muzzle quicker than the other but both exit at the same velocity.
garandman
Bolt Gun Bodacious
In my experience, my experience will often have little / no bearing on your experience.
If I have a CM and x47 bbl, and so do you, then we have 4 bbls to create variables. In my experience, they will indeed vary.
One exception to all that was with my 6.5 CM. People told me 140 grain bullets with 41.5 grains of H4350 and that pretty much proved out to be exactly the best load. That load hasnt worked out for others. Likely because when Different people start hand loading ammunition , You add several dozen more variables.
But generally speaking the only universal is that there are no universals.
If I have a CM and x47 bbl, and so do you, then we have 4 bbls to create variables. In my experience, they will indeed vary.
One exception to all that was with my 6.5 CM. People told me 140 grain bullets with 41.5 grains of H4350 and that pretty much proved out to be exactly the best load. That load hasnt worked out for others. Likely because when Different people start hand loading ammunition , You add several dozen more variables.
But generally speaking the only universal is that there are no universals.
^^^^You could start a thread just on this one post right here.
6.5CM wins,
The x47 is too expensive compared, no where near the support as 6.5CM, the velocities are slower and you have to push it to the limits to get the proper speed, and those who cry, but lapua brass, that is just a smoke screen.
The only benefit was when there was no 6.5CM because it was then only compared to the 260REM and at the time guys were loading that too long to fit in a magazine. The 6.5CM solved the same problem with magazine length loading.
6.5CM all day long
The x47 is too expensive compared, no where near the support as 6.5CM, the velocities are slower and you have to push it to the limits to get the proper speed, and those who cry, but lapua brass, that is just a smoke screen.
The only benefit was when there was no 6.5CM because it was then only compared to the 260REM and at the time guys were loading that too long to fit in a magazine. The 6.5CM solved the same problem with magazine length loading.
6.5CM all day long
A wide accuracy node may be confused with Optimum Charge Weight (OCW). This indicates the optimum powder and charge, with the components used, that displays a nice flatish pressure curve around peak pressure. A pressure profile such as this (a long wide pressure curve with deterrent chemicals in the powder consumed at peak pressure) will mask, at least to a degree, any variables in the loaded cartridge, such as varying charge weight, COL, internal volume of case etc.
Do you think that is that because of inertia or because the 6.5L is better than the 6.5CM?
If I was already set up with a rifle, barrel, reamer, brass, bullets, powder, primers, dies, load data, etc. for one cartridge and another cartridge comes along that is very similar, I'd think long and hard before giving up on my existing gear for a potentially marginal improvement.
My personal opinion is that between these two, you get to pick a little more speed or a little more inherent accuracy but not both. I like the 6.5CM ok but, it's no dasher.
The Lapua holds records, the Creedmoor is the Wal-Mart equivalent. Flame suit on, let me have It!! 
Paul
Paul
HTSmith
Silver $$ Contributor
That is a fair question. I'm sticking with the 260 Rem because I have all the reloading gear including enough Lapua brass to wear out a couple of more barrels. If I were starting from scratch I'd likely go with one of the new kids.
ckaberna
Gold $$ Contributor
Lapua brass a "smokescreen"?????.. Really? LoL
The 6,5x47 L was developed by Lapua and G+E, specifically for inherent accuracy, and good barrel life. For use in 300m CISM etc.
And is pretty much an upscaled dasher.
The 6,5 CM was ¨develpoed¨ to run 130-140 gr 6,5 bullets in a SA AI mag with maximun speed, without length restriction for prs competition , pretty much.
They both do well, one is widely used for its inherent accuracy BR,F class, an several other competitions, and holds plenty of records.
The other is super popular, and has loads of factory ammunition available, while it delivers a bit more speed.
They're both good designs, for what they was made for pick whatever suits you.
And is pretty much an upscaled dasher.
The 6,5 CM was ¨develpoed¨ to run 130-140 gr 6,5 bullets in a SA AI mag with maximun speed, without length restriction for prs competition , pretty much.
They both do well, one is widely used for its inherent accuracy BR,F class, an several other competitions, and holds plenty of records.
The other is super popular, and has loads of factory ammunition available, while it delivers a bit more speed.
They're both good designs, for what they was made for pick whatever suits you.
The 6.5 Creedmoor was originally designed for highpower course shooting.
I doubt Dennis DeMille was thinking of PRS but that is the discipline that adopted the cartridge and kept it alive along with little bit of marketing.
Marc Mittry
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No flame here. Just sadness, tears, and hurt feelings.The Lapua holds records, the Creedmoor is the Wal-Mart equivalent. Flame suit on, let me have It!!
Paul
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