OK, My turn on the 6.5 Creedmoor

[Bravo 4]

A a longer heavier bullet with a better ballistic coefficient is inherently more accurate than a shorter, lighter lower ballistic coefficient bullet. Physics makes one inherently more accurate, not magic.

If this were true then wouldn't short range benchrest shooters be using the longer higher BC bullets, other than the opposite?

 

[okie man]

My best 100 yard groups are with flat base target bullets. I've used Sierra 55 grain spritzers in my 223 for years with incredible accuracy

 

[the hunter]

If this were true then wouldn't short range benchrest shooters be using the longer higher BC bullets, other than the opposite?

Key word there, the longer bullets will be more accurate at longer range, case design and the way it makes the powder burn will also help. But in the long run better barrels will help the most.

 

[Bravo 4]

Does a VLD and bottail (higher BC) design make a bullet more accurate at long range, or does it just make the shooter have a higher probability of a hit due to greater margin of error in wind and such? I've read on multiple accounts that a flat based bullet is easier to make more consistent, or is that just an old wives tale?
Now if we are talking lathe turned monos like Hammer and Cutting Edge, then I can see that as having the most potential to be consistent and accurate (if consistency equals accuracy).

 

[okie man]

I was always under the impression flat base bullets were more accurate. Something about gas pushing against it versus a boat tail

 

[MudRunner2005]

Buy as many boxes of ammo you can for your 7mm, then buy as many as you can for your 308. Shoot targets with each group, I bet there's a higher chance that the 308's groups aggregate smaller.

My experience with wbys is try every ammo available and one might group well. The others are horrible. Grab a 308 and one box might be horrible the rest are pretty decent

2 part answer for a 2 part question...

First, no, I have 7mm's that group just as well as my .308 Win. Shooting and reloading disciplines are equal for both. Why would I shoot factory ammo? Factory ammo for a test like this is non-grata.

Weatherbys don't shoot worth a crap because of the stupid freebore design. And back when Roy was alive and designed his cartridges 1.5" to 2" at 100 was considered "good" hunting accuracy. You can't compare a Weatherby to a .308 Winchester, unless the Weatherby has a custom chamber that reduces all that freebore back to a normal level. This comparison is like comparing apples to fishing poles.

 

[Canhunter35]

I was always under the impression flat base bullets were more accurate. Something about gas pushing against it versus a boat tail

I've never shot a flat base match bullet, but in my experience match bullets with boat tails are more accurate then flat base hunting bullets, lol.

 

[MudRunner2005]

I've never shot a flat base match bullet, but in my experience match bullets with boat tails are more accurate then flat base hunting bullets, lol.

A lot of guys shooting benchrest 6mmBR use flat-base bullets.

 

[Canhunter35]

2 part answer for a 2 part question...

First, no, I have 7mm's that group just as well as my .308 Win. Shooting and reloading disciplines are equal for both. Why would I shoot factory ammo? Factory ammo for a test like this is non-grata.

Weatherbys don't shoot worth a crap because of the stupid freebore design. And back when Roy was alive and designed his cartridges 1.5" to 2" at 100 was considered "good" hunting accuracy. You can't compare a Weatherby to a .308 Winchester, unless the Weatherby has a custom chamber that reduces all that freebore back to a normal level. This comparison is like comparing apples to fishing poles.

To me inherent accuracy of a cartridge isn't what you can achieve it's how accurate it is on the broad range of bullets and powders. Is a 308s worst group better than a non-inherently accurate cartridges worst group, probably.
Forget the ammo then, load three rounds at 1gr increments from min to max in ur load manual for ur 308 and 7mm and I bet the 308 aggregates smaller than ur 7mm.
That's inherent accuracy when the chamber design is forgiving in load and billet variations

 

[MudRunner2005]

Still doesn't. I'm not trying to refute your point just to make mine valid... In my experiences, good loading practice and good shooting skills help to minimize margin of error.

You take a well-known accurate 7mm-08 and a well-known accurate .308 Win and test them side-by-side, I bet they both shoot nearly the same groups with their most accurate loads.

 

[Canhunter35]

A lot of guys shooting benchrest 6mmBR use flat-base bullets.

Read my post, I bet they're not shooting interlocks or similar lol.

 

[FEENIX]

Seems like the people who have a 6.5 CM love and people who don't have one hate them.

Yep!

 

[MudRunner2005]

Read my post, I bet they're not shooting interlocks or similar lol.

They're shooting paper, why would they need to shoot an interlock or bonded bullet?

 

[Canhunter35]

Still doesn't. I'm not trying to refute your point just to make mine valid... In my experiences, good loading practice and good shooting skills help to minimize margin of error.

You take a well-known accurate 7mm-08 and a well-known accurate .308 Win and test them side-by-side, I bet they both shoot nearly the same groups with their most accurate loads.

They might even shoot the same group with there worst load, but I doubt necking down a 308 a few thousands causes it to lose its inherent accuracy.
What I'm talking isn't measured by the best, but by the worst group