6.5 Creedmore or .308 Win. ?

[Creedmoor shooter]

Why or what makes the creedmore have better (less) wind drift?

Not meaning to hyjack just thought wind drift will be less the heavier the bullet and more velocity helps some?

It drives a lighter, higher BC bullet faster. The bc is what makes the difference not so much velocity. Actually a 308 with 200+ grain bullet will come close to the 6.5

 

[MudRunner2005]

It drives a lighter, higher BC bullet faster. The bc is what makes the difference not so much velocity. Actually a 308 with 200+ grain bullet will come close to the 6.5

Yep! So close in-fact, that the dopes are almost a wash, but the heavy 200+ grain .308 Win actually will retain more velocity and energy, despite the slower starting MV, over the lighter smaller 6.5mm bullets.

 

[Creedmoor shooter]

Yep! So close in-fact, that the dopes are almost a wash, but the heavy 200+ grain .308 Win actually will retain more velocity and energy, despite the slower starting MV, over the lighter smaller 6.5mm bullets.

I come up with a 308 having 5 moa more drop at 1k, slightly less than 1 moa more wind drift than a 6.5, slightly less velocity, but more energy.

 

[MudRunner2005]

I come up with a 308 having 5 moa more drop at 1k, slightly less than 1 moa more wind drift than a 6.5, slightly less velocity, but more energy.

https://www.longrangehunting.com/th...g-cartridges-limitations.191001/#post-1337371

 

[Creedmoor shooter]

I'll mention that running a 147 eld-match vs a 208 eld-match

 

[Creedmoor shooter]

https://www.longrangehunting.com/th...g-cartridges-limitations.191001/#post-1337371

You didn't mention how fast you ran the 308 at. 2700 in a creed is definitely not it's full potential to say the least.

 

[dmoon]

This isn't as fun as the "Facebook" thread...

Yep! So close in-fact, that the dopes are almost a wash, but the heavy 200+ grain .308 Win actually will retain more velocity and energy, despite the slower starting MV, over the lighter smaller 6.5mm bullets.

Energy yes.....velocity no. Simple physics, run REAL numbers through any ballistics program. Roughly six MOA difference in drop difference @ 1000, roughly 1.5 @ 500. Using 200 hybrid and 140 hybrid and speeds from my two rifles...I wouldn't shoot either past 800-900 yards on deer sized game due to lack of energy though....

 

[MudRunner2005]

You didn't mention how fast you ran the 308 at. 2700 in a creed is definitely not it's full potential to say the least.

I forgot to list that I was averaging the .308 Win at around 2,500 FPS, which is average for 24-26" barrels using the 215 Hybrid. As for the Creed's velocity, I was going by the manual's hottest load, since I don't have one, I had to use manual data for the Creed to get my numbers for it.

 

[MudRunner2005]

This isn't as fun as the "Facebook" thread...


Energy yes.....velocity no. Simple physics, run REAL numbers through any ballistics program. Roughly six MOA difference in drop difference @ 1000, roughly 1.5 @ 500. Using 200 hybrid and 140 hybrid and speeds from my two rifles...I wouldn't shoot either past 800-900 yards on deer sized game due to lack of energy though....

So what are your REAL numbers for the .308 Win? I hover right at 2,500 FPS MV with a 215 Hybrid in my 24" barrel.

 

[coop2564]

Im starting to lean toward the 6.5. Reason being i have a 3006, 300 wsm and 2 7RM's so i have everything the 308 can do beat. On my smaller guns i only have a 6.8 spc ll which is only good energy wise to about 350yds. So the 6.5 could extend that out a lot for deer and varmints along with nice target shooting.

 

[Creedmoor shooter]

I forgot to list that I was averaging the .308 Win at around 2,500 FPS, which is average for 24-26" barrels using the 215 Hybrid. As for the Creed's velocity, I was going by the manual's hottest load, since I don't have one, I had to use manual data for the Creed.

Manual data for a 140 is about 2800-2850. Sierra list the new 150 at 2800 in a 24in

 

[MudRunner2005]

Manual data for a 140 is about 2800-2850. Sierra list the new 150 at 2800 in a 24in

Berger manual, page 538, Ramshot Hunter is listed as the hottest load at 2,700 FPS exactly with a powder charge of 42.4 grains, for the 140 grain bullets.

Manual data will vary, I was just going by what the Berger manual said.

 

[Creedmoor shooter]

Berger manual, page 538, Ramshot Hunter is listed as the hottest load at 2,700 FPS exactly with a powder charge of 42.4 grains, for the 140 grain bullets.

Manual data will vary, I was just going by what the Berger manual said.

I have the berger manual but never use it. They are very conservative on they're creed data. The new stuff they just put out is much better

 

[Creedmoor shooter]

Updated data