6.5 Creedmoor the rising star?
- Thread starter Mikeness
- Start date
lejarretnoir
CGN Ultra frequent flyer
- Location
- 162km from Connaught
You need to reread my posts. I know it's short, but some people are still shooting it like that with short necks. Since you're smarter than me look it up on the web and you'll see what others have done. Why believe anything I say?
Yes, based loosely on a 308 case, more like a 250 Savage case necked up and blown out or slightly longer 6.5x47L. Hornady and Creedmoor can make any claim they like. OK, they made new brass, but the case design is not really new. Minimum body taper, 30° shoulder. That's been around for a long time, but don't believe me. Ask Jerry, you trust him.
I don't understand how the 6.5x55 Ackley compares to the Creedmoor? I'm at a loss where you're going there.
Once again around the Merry-Go-Round.
Why don't you tell us all the facts about consistency?
What makes the Creedmoor the rising star as I haven't seen any info from you?
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Like .280 Ross for example, designed by F. W. Jones before WWI, and copied by Vom Hofe, it was the grandfather of all 7mm/.280 magnums.
Maybe "F. W." stood for "Friedrich Wilhelm"?
Then again, maybe not!
Stereotypes...they're such a hoot!
You need to reread my posts. I know it's short, but some people are still shooting it like that with short necks. Since you're smarter than me look it up on the web and you'll see what others have done. Why believe anything I say?
Yes, based loosely on a 308 case, more like a 250 Savage case necked up and blown out or slightly longer 6.5x47L. Hornady and Creedmoor can make any claim they like. OK, they made new brass, but the case design is not really new. Minimum body taper, 30° shoulder. That's been around for a long time, but don't believe me. Ask Jerry, you trust him.
I don't understand how the 6.5x55 Ackley compares to the Creedmoor? I'm at a loss where you're going there.
Once again around the Merry-Go-Round.
Why don't you tell us all the facts about consistency?
What makes the Creedmoor the rising star as I haven't seen any info from you?
i like you,you are very patient
This. Very well said.
Obtunded, nice to see you around again. I did miss your posts.
Agreed! Very nice to see you posting again Obtunded!
ultimate_monkey
CGN Ultra frequent flyer
- Location
- victoria BC
so you dug up a 5 year old thread, to delete or edit all the posts you made simply to rest your case about the 6.5 staying around??
The 6.5 Creed is a well balanced cartridge.
You will notice that all "popular favorites" for long range shooting are balanced between the bullet weight to powder charge ratio of around 3:1, meaning the bullet is 3 times the weight of the powder charge and the bullet is just about the heaviest bullet offered in the caliber.
Based on this math, if the 6.5 Creed does not become more popular... it should.
Consider the 6x47 Lapua... 115 grain bullets and 38.3 grains of 4350. 115/3=38.3 grains of powder
224 Valkerie with 80s or 90s... 80/3-26.66 grains, 90/3=30 grains of powder
6.5 Creed with 140s... 140/3=46.66 grains of powder
By contrast
22-250 is crazy out of spec for long range in the typical offering with light bullets and can sneak up on 1:1 ratio, and with heavies like the 80 SMK is still around 2:1
Now I'm not knocking the 308 Win because it does not really fall in line with the 30 cal heavies but in the common config for competition with 155s to 185s it's a little under gunned with ratios like 4:1
But if you are to make a mistake, I would favor a 4:1 over anything worse the 3:1 because the powder burn rates on 4:1 are faster and cleaner and maintain accuracy better over a long day at the range. Take the 6BR for example.
I don't care for the 6 Creed because it does not fall in line with this guideline and holds too much powder.
You will notice that all "popular favorites" for long range shooting are balanced between the bullet weight to powder charge ratio of around 3:1, meaning the bullet is 3 times the weight of the powder charge and the bullet is just about the heaviest bullet offered in the caliber.
Based on this math, if the 6.5 Creed does not become more popular... it should.
Consider the 6x47 Lapua... 115 grain bullets and 38.3 grains of 4350. 115/3=38.3 grains of powder
224 Valkerie with 80s or 90s... 80/3-26.66 grains, 90/3=30 grains of powder
6.5 Creed with 140s... 140/3=46.66 grains of powder
By contrast
22-250 is crazy out of spec for long range in the typical offering with light bullets and can sneak up on 1:1 ratio, and with heavies like the 80 SMK is still around 2:1
Now I'm not knocking the 308 Win because it does not really fall in line with the 30 cal heavies but in the common config for competition with 155s to 185s it's a little under gunned with ratios like 4:1
But if you are to make a mistake, I would favor a 4:1 over anything worse the 3:1 because the powder burn rates on 4:1 are faster and cleaner and maintain accuracy better over a long day at the range. Take the 6BR for example.
I don't care for the 6 Creed because it does not fall in line with this guideline and holds too much powder.
I don't think it has anything to do with an imagined phenomena of 'magic powder weight to bullet weight ratio.' I think it has everything to do with being able to drive the most aerodynamic and sectionally dense bullet for a given caliber at right around 3000fps. Any faster drastically decreases barrel life, any slower has too much time of flight (which incurs drop and wind drift penalties). The cartridge and calibre is only important in its ability to position that shape of bullet determined above properly in a chamber (distance to lands), and feature an optimal twist rate for that bullet. Shoulder angle and case taper can be tweaked.
Hmmm... and how exactly do you do that???
Think it through now...
By running about 1/3 of the above mentioned high BC bullet weight in powder.
This is not magic... its just physics.
The shape of the case has little bearing on this point.... (think 260 Rem vs 6.5 Creed), but the powder capacity does. Although the shape of the case (shoulder angle) will influence velocity consistency (slightly) and how much the brass flows forward after firing and how often you will need to length trim the cases. If you don't reload, it wont matter much... If you do reload, rounds like the 6.5 Creed, 6x47L, 6XC is a little easier.
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Another example of this 3 to 1 bullet to powder weight formula is that David Tubbs recently set an ELR record at 2 miles with a necked down 338 Lapua running 109 gains of powder with a 360 grain bullet.
Not exactly 3 to 1 but close enough to support the point.
Most ELR guys run a little more powder than Tubbs for ELR.
Not exactly 3 to 1 but close enough to support the point.
Most ELR guys run a little more powder than Tubbs for ELR.
