6xc vs 6x47 vs 6mm creed

[Rtheurer]

Oh.

 

[6xcshooter]

What is "Neck Angle?"

lol, right, shoulder angle

 

[Hengehold]

I have used about 4-5 6xc barrels now and it is a great cartridge to shoot. I ran into an issue when I had a smith chamber a barrel with his reamer. As it turns out, His reamer was an old model so it had a smaller diameter base. It was designed to be used in the early days when the 6XC had to be fire formed from 22-250 brass. My Norma brass would not work in that barrel because Norma brass is made based on the 308 Win case web not the 22-250 case web which is a difference of a couple of thousandths in web diameter. Had to order my own reamer (6XC II from 6mmar.com) to fit the Norma brass.

That is a long story to illustrate the point that it would be wise to go with a cartridge that has SAMI standardization. Will mitigate a lot of potential discrepancies between your chamber, dies, and brass.

What I have decided to do is own my own reamer (6XC II) that is built for use with Norma brass and have size dies made from brass fired in my chamber. I think if you are shooting a wildcat, that is what needs to be done to ensure all pieces match.

The 6BR is sounding better all the time
;-)

-T

 

[Catfur]

I shoot a 6XC in Fclass. If I had it to do all over again today, I'd do a 6 Creedmoor, simply due to less work on case prep. But at this point I own my own 6XC reamer (for the same reasons as the last poster). I don't use butter soft Norma brass, but fire form Lapua .22-250 brass. I've also picked up some 6.5CM brass (small pocket) to see how difficult that is to form to 6XC, and how well it lasts. I also shoot a tight neck chamber (.270") which requires neck turning.

Interestingly, the specification (SAAMI) on case head size for the .22-250 is the same as for the .308 Win (which is the same as the .30-06, which is the same as the 7.92mm IS, etc...), why American brass manufacturers made their .22-250 brass so much smaller in the head, I may never know, but it sure made for a pain in the butt with the 6XC. Lapua .22-250 brass is about .467, not the .465 or smaller that a lot of .22-250 brass is.

 

[barnjoer]

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!

Depends on Powder and Bullets
34gr IMR 3031 or 42gr IMR 4831 for 243 hunting loads. 6xc 38.5 H4350 at 2980 fps
Why every body concerned with such high velocity on there Bullets when lower velocity will do exactly the same thing save on powder save barrel life. 1/4 moa at 1000 with the 6xc 38.5gr H4350 works for me

 

[Milo 2.0]

Depends on Powder and Bullets
34gr IMR 3031 or 42gr IMR 4831 for 243 hunting loads. 6xc 38.5 H4350 at 2980 fps
Why every body concerned with such high velocity on there Bullets when lower velocity will do exactly the same thing save on powder save barrel life. 1/4 moa at 1000 with the 6xc 38.5gr H4350 works for me

Not everyone shoots paper targets and gets sighters, there are times when that extra 100-120fps may be the diff between a hit and a miss.

 

[barnjoer]

Not everyone shoots paper targets and gets sighters, there are times when that extra 100-120fps may be the diff between a hit and a miss.

You are correct and it might rain on your garden and you might have to water it who knows. My 6xc is for shooting steel at 1000+ yards the 243 is for hunting.