Most accurate cartridge 600/1000 in 308 size mag?

[DngBat7]

I know this is a pretty wide question, but certain there is a easy answer. I want to get a new barrel soon for a tactical rifle I have, and want to start thinking about have a reamer made. My question is what is the most accurate 600/1000 cartridge to fit 308 length mag and bolt face. I see all kinds of opinions out there, but I want to know what the benchrest/fclass crowd use for this. Right now the gun is 6.5cm but am ok with switching calibers with a new barrel. 6mm, 6.5mm? What is considered the 6ppc of long range?

 

[22DASHER]

The 6 Dasher or 6 BRA are inherently more accurate then the rest, that’s been proven time and time again. Whether or not one can shoot the difference or read the wind that accurately is the question.

 

[Immike]

Rod Brakhage just smoked everyone at Sierra cup and SWN with a 6.5x47L shooting 140’s

 

[Straightshooter1]

I know this is a pretty wide question, but certain there is a easy answer. I want to get a new barrel soon for a tactical rifle I have, and want to start thinking about have a reamer made. My question is what is the most accurate 600/1000 cartridge to fit 308 length mag and bolt face. I see all kinds of opinions out there, but I want to know what the benchrest/fclass crowd use for this. Right now the gun is 6.5cm but am ok with switching calibers with a new barrel. 6mm, 6.5mm? What is considered the 6ppc of long range?

If you haven't already read this article, take a look:

https://precisionrifleblog.com/2018/12/14/rifle-caliber/

And you might take a look through this:

https://www.accurateshooter.com/category/cartridge-guides/

 

[Dgd6mm]

The 6 Dasher or 6 BRA are inherently more accurate then the rest, that’s been proven time and time again. Whether or not one can shoot the difference or read the wind that accurately is the question.

^^^^^^ This.

 

[gtl1946]

Look at what 22Dasher said and then come to the honest realization that YOU are the one who makes it so,not the cartridge !

 

[dkhunt14]

In 1000 BR. The cartridges winning aggregates and setting records are 6 Dasher, 6 BRA, 6.5x47 Lapua and 300 WSM. But the WSM is a magnum bolt face. They do 95 percent or more of the winning. Matt

 

[XTR]

Are you looking for pure precision for 5 shots in a condition that the BR guys chase, or are you looking for a round that will launch high BC bullets at velocities that buck the wind better and be more forgiving of wind calling?

Are you shooting groups, shooting for score, or trying to ring steel?

 

[DngBat7]

In 1000 BR. The cartridges winning aggregates and setting records are 6 Dasher, 6 BRA, 6.5x47 Lapua and 300 WSM. But the WSM is a magnum bolt face. They do 95 percent or more of the winning. Matt

forgive my ignorance, but I see fclass shooters shoot 284 shehane? Why this over the others or am I reading wrong, or that cartridge does not get used in br?

 

[DngBat7]

Are you looking for pure precision for 5 shots in a condition that the BR guys chase, or are you looking for a round that will launch high BC bullets at velocities that buck the wind better and be more forgiving of wind calling?

Are you shooting groups, shooting for score, or trying to ring steel?

Pure precision

 

[Ringostar]

forgive my ignorance, but I see fclass shooters shoot 284 shehane? Why this over the others or am I reading wrong?

BR and F class are different shooting disciplines. BR fires a 5 or 10 shot group very quickly. F class fires one shot at a time, waiting for target to be scored with each shot. It is strictly for score over 15 or 20 shot strings. Conditions changing through the string and attempting to make a proper wind call for each shot fired. Therefore the 7mm is usually preferred in F class as it can cut the wind a little better than some other choices. The 300 wsm is used also for its wind cutting, however recoil through 20 shots plus sighters can be a bit much for some shooters.

 

[MarkS]

Any of the 6mmBR IMP are great. I shoot a 6BRX 30 degree shoulder. The newer 6BRA is the best case cap. size.

Mark

 

[Ringostar]

I personally wouldn’t recommend a 284 to be mag feed through a short action. The 180 class bullets need to be seated long to take full advantage of case capacity.

 

[Ringostar]

If most of your shooting will be 200 yds, the little 6’s are probably your best option. I don’t have a 6br, but have heard some not getting them to feed well from a mag. Maybe someone else has some tips for this. Another option would be the 6.5x47L with 123gn bullets.

 

[Dgd6mm]

In your opening post you state that you want a new barrel soon for a tactical rifle.

If most of your shooting will be 200 yds, the little 6’s are probably your best option. I don’t have a 6br, but have heard some not getting them to feed well from a mag. Maybe someone else has some tips for this. Another option would be the 6.5x47L with 123gn bullets.

There are plenty of people getting the 6br case and it's variants to feed from AI type mags.

I'm a little confused. 600/1000, benchrest, f class, tactical... if you are only going to be at 200 yards for some time to come you have plenty of options from a good .22lr to a good 6mm.

 

[dkhunt14]

forgive my ignorance, but I see fclass shooters shoot 284 shehane? Why this over the others or am I reading wrong, or that cartridge does not get used in br?

Seems in BR, the 284 or Shehane version just doesn't have the sheer accuracy needed for BR. I have seen quite a few try in the past. BR is more about accuracy then wind drift for score.

I was just stating what is being used. About 90 percent of the guns are 6 Dasher, 6 BRA or 300 WSM. The 6.5x47 wins a lot for the number of guns shot. It is way lower number then a Dasher or BRA. These results are from Williamsport where we have 90 light guns and 60 heavy guns shot every two weeks. So these are statistics from a good sampling of guns and targets shot. Matt

 

[XTR]

Watch some videos and see what you want to do. BR is not shot from a magazine. It is single loaded.

Most any custom rifle in any chambering is capable of shooting in the .3 to .5 MOA range or better with good load development, whether or not the shooter can is another issue. Getting that down from .3 to .1 for more than a wallet group once is more than just picking a chambering.

 

[CaptainMal]

You read like you are shooting that tactical stuff and using a magazine. You really do not need to be that accurate and doing so with cartridges that are super accurate will compromise feeding from a magazine.

The 6.5 X 47 is an inherently accurate cartridge by design and should feed reliably. It is not stupid big so blast and barrel life is decent Consider that over any Creedmore or 260.

 

[linebaugh]

I don't exactly follow the original posters requirements as they jump around a bit but from what I have read I would consider 6x47L or even possibly 6.5x47L. For what I gather in the postings this is probably a good option to bridge many diciplines requiring top accuracy. Good cases, reasonable case volume, good neck length and a case that allows you to seat bullets out into the neck and still feed throught a short action. Did I mention it will mag feed well which seems to be a requirement?

If it's only teeny tiny groups pick an incarnation of the 6BR possibilities and go with a solid single shot action.

 

[DngBat7]

Sorry. I did ask one question, and seemingly got off topic when I started reading articles on long range fclass/br. Then my mind wanders. I could be wrong, but sounds like going with a 6.5x47 may be a good all round cartridge to try any of these different disciplines, especially considering the type of gun it is. When I move in the near future, is like to try long range br, prs And fclass to see what I like best. I guess at that point, I’ll get the approximate rifle. Thanks for everybody’s input.