6xc vs 6x47 vs 6mm creed

[Patton243]

Uneven soot is because the brass is still forming up to the new shape? I am no supper expert here though, Even my BRX did that. Also my 6.5x47 did it the first firing. Had uneven soon on my 54rImproved too and that never went away. Not the smiths fault, just bad reamer design i think.

How tight is your neck?

Neck is tight I think it's .003. At any event, once the virgin cases are fired the issue goes away. Even with virgin brass I was getting around .5-.75 MOA. This is the first cartridge I ever had where I had to neck down brass. I think I'll be staying away from these in the future.

As I stated previously, I would stick with a 243 for simplicity. But I still like the 6x47 cartridge after the cases are fire formed.

 

[Patrick Comte]

Its not on your list, but have you thought about maybe a 6 competition match or the equivalent? I know its a little more work on the front end, though I'm chambering my next barrel in a caliber very similar due to the research I've done. You can push 105 grain bullets ~3150 with H1000 and have superb barrel life which is something all three of your choices lack due to the powder selection that works with those cases. Look at Chad Dixon's write up, give it a read, see what you think. Its worth a look. Good luck though! Caliber selection is a pain! Choose one and shoot it.

 

[r bose]

6xc for me. I'm not one to tinker. I buy Norma brass, use proven load data available just about anywhere, and shoot. Sometimes it's best to keep it simple.

 

[MDM]

One thing I don't like about the 6x47 Lapua is necking the cases down from 6.5 to 6mm. That gave me some neck issues. However, after they were fired once I had no issues. Something to think about if you're still deciding between the 6mms. I would imagine the 6mm Creedmoor would have the same issue too.

I had issues too necking down virgin brass with Forster FL dies. Crooked necks and uneven case mouths. I'd have to trim the brass .005 to get the mouths square. I think the virgin brass is so undersized that it's not fully supported in the die during the neck down.

My solution...I shoot the 6.5x47 too, shoot the virgin brass in it, then neck down to 6mm. My theory is once the case is blown out, the body is fully supported by the die and they come out perfect every time when necking down fired brass.

 

[Milo 2.0]

I had issues too necking down virgin brass with Forster FL dies. Crooked necks and uneven case mouths. I'd have to trim the brass .005 to get the mouths square. I think the virgin brass is so undersized that it's not fully supported in the die during the neck down.

My solution...I shoot the 6.5x47 too, shoot the virgin brass in it, then neck down to 6mm. My theory is once the case is blown out, the body is fully supported by the die and they come out perfect every time when necking down fired brass.

Your 2nd paragraph makes a ton of sense. I too had issues necking down with a Forster FL non bushing die, I pulled the guts from the die, necked down, then expanded with expander mandrel, then set neck tension, no issues then. My conclusion it was the expander ball.

 

[Milo 2.0]

I've shot all you've mentioned, plus 6 slr and 6 comp match, for simplicity and out of the box accuracy, I would go xc.
Every case has it's pros, the number and severity of the cons is what steers me today. That and the smiths reamer selection, I despise too much freebore. You can never put back what is taken out, but always ream more.

 

[MDM]

Your 2nd paragraph makes a ton of sense. I too had issues necking down with a Forster FL non bushing die, I pulled the guts from the die, necked down, then expanded with expander mandrel, then set neck tension, no issues then. My conclusion it was the expander ball.

Cool. Same here... I found that method to be better than just doing it all in one pass too. Hell, I've been necking down some OLD 6.5 brass that's 7 years old and been fired more than I can remember. Those come out perfect when necked down in one pass but I sure wasn't happy with how the virgin stuff was coming out.

 

[teele1]

for what its worth 6 Competition Match can shoot competitively even fire forming brass and 4,00 rounds competitively out of a barrel when shot/cleaned correctly

 

[Milo 2.0]

for what its worth 6 Competition Match can shoot competitively even fire forming brass and 4,00 rounds competitively out of a barrel when shot/cleaned correctly

Wow, I got 1800 out of my first one, after a second pressure dump, there was no bringing it back. The 2nd barrel was toast at 1200, dumped speed at 600 first time, 1150 the 2nd. So I'm not buying into your statement.

 

[Sniper338]

Why not a 6BR or dasher?

They all shoot... anything besides a 243 imo... had a bad run with one before..

 

[teele1]

Milo, were you running H1000? Polishing the throat ?
I have over 2700 thru mine now and I know DGD6MM good over 4000 thru his last one. Sure there is some velocity but..

 

[Milo 2.0]

Milo, were you running H1000? Polishing the throat ?
I have over 2700 thru mine now and I know DGD6MM good over 4000 thru his last one. Sure there is some velocity but..

IMR 7977 was my choice, 3100 fps 105 hybrids, never remotely considered the load warm, would drop down to H4831 on pressure dumps to get speed back. I keep hearing these barrel life predictions, hasn't worked on my end, I can live with 1800 from a 6mm, not 1200 though.

 

[teele1]

well there you go H1000 is a single based powder i dont know anything about IMR 7977 go out and read the development of the 6CM by Joe Hendricks......I've tried to shoot mine as he prescribed even tho I'm not even close to the shooter he is. Not trying to pimp something that isn't true...that does nothing for me...shoot strait

 

[Rob01]

Both my team mate's 6 Comp Matchs went about 2800 rounds and that was it. They used H1000. 115s at about 3050. Having to foreform was a non starter for me and watching them peck like chickens looking for their brass at matches showed me I made the right choice.

 

[NZVarminter]

one of the most common reasons why people say go 6xc or 6-6.5/47 over the 243 is better barrel life as these cartridges have 5-7g less capacity....but I've just run Quickload for 243, 6-6-5 x 47 ad 6xc and it gives some surprising results:

case Capacity overflow Usable PMax Normal MAx powder wt vel
243 win 54.0 48.0 60191 59000 H4350 41.7 2995
6xc 49.7 46.4 65000 63000 H4350 42.5 3076
6xc 49.7 46.4 65000 59000 H4350 41.7 3016
6-6.5x47 47.0 44.5 63091 63000 H4350 41.1 3025
6-6.5x47 47.0 44.5 63091 61000 H4350 40.7 2996

Tell me again why the 243 is a barrel burner?? its using less powder than the 6XC!

 

[rafale]

Its not on your list, but have you thought about maybe a 6 competition match or the equivalent? I know its a little more work on the front end, though I'm chambering my next barrel in a caliber very similar due to the research I've done. You can push 105 grain bullets ~3150 with H1000 and have superb barrel life which is something all three of your choices lack due to the powder selection that works with those cases. Look at Chad Dixon's write up, give it a read, see what you think. Its worth a look. Good luck though! Caliber selection is a pain! Choose one and shoot it.

Avec un nom comme le votre vous etes au moins français?

Michel

 

[Patrick Comte]

Avec un nom comme le votre vous etes au moins français?

Michel

My grandfather was! I don't speak French though. Wish I did.

 

[6xcshooter]

one of the most common reasons why people say go 6xc or 6-6.5/47 over the 243 is better barrel life as these cartridges have 5-7g less capacity....but I've just run Quickload for 243, 6-6-5 x 47 ad 6xc and it gives some surprising results:

case Capacity overflow Usable PMax Normal MAx powder wt vel
243 win 54.0 48.0 60191 59000 H4350 41.7 2995
6xc 49.7 46.4 65000 63000 H4350 42.5 3076
6xc 49.7 46.4 65000 59000 H4350 41.7 3016
6-6.5x47 47.0 44.5 63091 63000 H4350 41.1 3025
6-6.5x47 47.0 44.5 63091 61000 H4350 40.7 2996

Tell me again why the 243 is a barrel burner?? its using less powder than the 6XC!

well your data is interesting but in my real world I get 3000 fps with 105 gr bullets with 39 gr of h4350. If I put 42.5 in my rifle I would have serious pressure issues. Also neck angle has alot to do with the 243 win being hard on barrels. I've had alot of 243s I'll stick with the 6XC

 

[Rtheurer]

What is "Neck Angle?"

 

[JBT47]

What is "Neck Angle?"

I believe he meant shoulder angle