6mm and 1-14 twist

[46490]

Are there any recommendations for a 6mm cartridge that would shoot well with a 1-14 twist barrel. This would be in a short action 308 bolt face and bullet recommendations and loads for target/br shooting from 100 to 1000 yards.

 

[BRGUY]

With a 1-14" twist barrel / 100-1,000 yard accuracy:

6mm Bench Rest and Improved

6mmX30-30 Improved

6mm-250

243 Winchester

6mm Ackley Improved

240 Weatherby Magnum

6mm-284

And I'm sure quite a few others as well. The cartridges listed are cartridges that I have personal experience with in a 1-14" twist barrel and long range shooting.

 

[alf]

The wind is going to slaughter any 14 twist suitable bullet at 1K.......

 

[BRGUY]

The wind is going to slaughter any 14 twist suitable bullet at 1K.......

So very true!!!

 

[HTSmith]

My advice would be to go to JBM ballistics and plug in some bullets and speeds. Doesn't look like you can push a 65 gr bullet fast enough to stay supersonic at 1000 yards.

 

[alf]

Per JBM....

Nosler 70 BT .310 BC at 3000 fps, 200 zero, at 1000 yards:
456" drop.....162" of wind deflection (10 mph) goes SS just before 800 yards.

Same at 3500
318" drop....134" wind....SS at 975

Same at 4000
230" drop....112" wind....SS at 1100

 

[RegionRat]

https://bergerbullets.com/twist-rate-calculator/

This web site tool is very easy to use and free.
When you trip into an example that drops below an SG of 1.5, they are nice enough to print out a list of suggested bullets that would work for the given inputs of speed and twist.

ETA: I agree with the points above that a 14 twist isn't heading for mid range or long range performance. Ideally, you would want to consider keeping this under 300 yards. YMMV

 

[wildcatter]

If using a 14 twist be prepared to settle for 300 to 400 yard max with bullets no heavier than 70 grains.

I have tried making a target rifle out 14 twist barrels in 6BR cases for over 30 years! My results were less than optimum!

I have went so far as shortening the case to a Tall Dog,, .085" short. I quickly found out on any benchrest course the 6PPC will never allow you to win!!

I also found out this was as good as it gets with lighter bullets in the BR,

I will never again build any rifle for a BR case, with a barrel slower than a 1-10 twist! 62 grain bullets at 3500 fps shooting 1/4 moa are expected, and if I want 80 and 95 grai n bullets will do as well, maybe a tad better around 3000 fps, and will not get laughed off the line at 600 yards,, with better wind reading skills probably 1000 yards as well.

But for me other than short range varmint use out to 400 yards is the only thing a 14" twist barrel is good for in a BR case, 22 or 6mm! When you consider that it will be much less finicky with a slower twist, even 1-12 will give as good a results with this case. If you want 1-14 plan your build around a 6PPC and enjoy as good as it gets. for me the 1-10 twist with a 6BR is my slowest twist I will consider for the 6mm BR Norma case!

You might hear of others stating they kill varmints like prarie dogs out 600 yards with the settup your asking about, but only the liars will tell you the hit more than they miss at those ranges! I say build it to be be reliable, not just to pull one out of yer ars now and then!!

 

[Webster]

Are there any recommendations for a 6mm cartridge that would shoot well with a 1-14 twist barrel. This would be in a short action 308 bolt face and bullet recommendations and loads for target/br shooting from 100 to 1000 yards.

I have a 6BR and a 6BRX. 14 twist. They will not shoot bullets over 70 GR with anything close to accuracy. You need 105-108 GR bullets for long distance and a 14 Twist won't shoot them. If you already have the barrel forget about long distance. Buy a barrel for 105 gr bullets.

 

[Bill Norris]

The 1 - 14 Tw. is great for shorter range shooting but as mentioned above at longer distances that twist and lighter bullets will get beat like a red-headed step child by the wind at the longer range shots.

 

[Flyshooter]

Well I can truly say my results are the opposite of wildcatter’s.......I’ve built many 14 twist Norma 6BR varmint rifles. Last count was 15 of them, BUT....and it’s a big BUT, I only chamber with a zero freebore reamer.

The intent is not to out group or out agg a PPC, because that’s not going to happen. If someone tells you they are or can, then their PPC is questionable at best.

However my experience has been for a live varmint/steel spinner rifle out to 300yd’s or a bit more using a 55 - 58 grain bullet in combination with Lapua brass & CCI450 primers.......it produce’s a rifle that shoot’s like a laser. And with excellent accuracy, in the calm it’s not difficult to print 5 shot groups you can cover completely with a quarter. I mean it’s only 300yd’s, you get those 55grn SBK’s going 3800fps and prairie dogs grow wings!!

Settle in on the 2” spinner at 300yd’s in the evening and spin it until you get hungry....but don’t miss or your partners watching in the spotting scopes will start in.....usually questioning if you should take up ping pong instead or if you normally shoot with your eyes shut....they shoot zero freebore 6BR’s too.....I Love America!!

 

[6bra1k]

Well I can truly say my results are the opposite of wildcatter’s.......I’ve built many 14 twist Norma 6BR varmint rifles. Last count was 15 of them, BUT....and it’s a big BUT, I only chamber with a zero freebore reamer.

The intent is not to out group or out agg a PPC, because that’s not going to happen. If someone tells you they are or can, then their PPC is questionable at best.

However my experience has been for a live varmint/steel spinner rifle out to 300yd’s or a bit more using a 55 - 58 grain bullet in combination with Lapua brass & CCI450 primers.......it produce’s a rifle that shoot’s like a laser. And with excellent accuracy, in the calm it’s not difficult to print 5 shot groups you can cover completely with a quarter. I mean it’s only 300yd’s, you get those 55grn SBK’s going 3800fps and prairie dogs grow wings!!

Settle in on the 2” spinner at 300yd’s in the evening and spin it until you get hungry....but don’t miss or your partners watching in the spotting scopes will start in.....usually questioning if you should take up ping pong instead or if you normally shoot with your eyes shut....they shoot zero freebore 6BR’s too.....I Love America!!

yeah but that is a bit short of 1000 yards

 

[Flyshooter]

About 700 yards short actually......yeah I pull out the 6BR 8 twist 104 freebore for 600, or the dasher.
Don’t shoot 1000 much, although it’s fun........no one who’s informed seriously expects to shoot a slow twist at 1000 for any kind of competition. A few nice impacts sure....now shoot a match in anything but an overcast dead calm and they’ll see the light.
Tough to exceed the current trends.......I hope the future offers quantum powder and time warp bullets. Then we could all shoot 1 mile with a light bullet slow twist set-up.....any subatomic particle physicists here?

 

[gunsandgunsmithing]

Who said anything about 1000 yards?
Of course the heavies hold a big advantage there, but show up at a short range match with heavies and you'll like go home humbled, at a measly 100-200 yard match.

 

[Bill Norris]

Who said anything about 1000 yards?
Of course the heavies hold a big advantage there, but show up at a short range match with heavies and you'll like go home humbled, at a measly 100-200 yard match.

Just as info:

46490 mentioned 1000 yds. in the original post.

Copied - Are there any recommendations for a 6mm cartridge that would shoot well with a 1-14 twist barrel. This would be in a short action 308 bolt face and bullet recommendations and loads for target/br shooting from 100 to 1000 yards.

 

[gunsandgunsmithing]

Just as info:

46490 mentioned 1000 yds. in the original post.

Copied - Are there any recommendations for a 6mm cartridge that would shoot well with a 1-14 twist barrel. This would be in a short action 308 bolt face and bullet recommendations and loads for target/br shooting from 100 to 1000 yards.

Ahh. My mistake since the op did mention 100 to 1000.
From a competitive standpoint, that's two different animals but for plinking at both distances, go with the fast twist and heavies. Sorry, I failed to read the op thoroughly before posting.
Neither combination is at its best at both but the fast twist might be sufficient for his needs/wants.

 

[Dub]

Just as info:

46490 mentioned 1000 yds. in the original post.

Copied - Are there any recommendations for a 6mm cartridge that would shoot well with a 1-14 twist barrel. This would be in a short action 308 bolt face and bullet recommendations and loads for target/br shooting from 100 to 1000 yards.

and I am pretty sure the answer is a solid NO

 

[JEFFPPC]

Who said anything about 1000 yards?
Of course the heavies hold a big advantage there, but show up at a short range match with heavies and you'll like go home humbled, at a measly 100-200 yard match.

The OP.

 

[Bill Norris]

and I am pretty sure the answer is a solid NO

Yea, I kinda doubt there is any combination to fit that total bill.