6MM X45 Build

[rbp75503]

Sounds like the round is just a little behind the 6PPC in both velocity and accuracy, is that what you're finding?

5spd would probably be better at answering your question. I have less than 30 rounds downrange and have just begun load development.
The reasons I chose the 6X45 is availability of brass and ease of converting from 223 to 6mm neck. Also mag feed is without problems.

[5spd]

5spd would probably be better at answering your question. I have less than 30 rounds downrange and have just begun load development.
The reasons I chose the 6X45 is availability of brass and ease of converting from 223 to 6mm neck. Also mag feed is without problems.

Ive never shot a 6ppc so I have no idea what the speeds run with the same bullets.
The 6ppc would be more accurate as it was made for bench shooting.
I swapped my heavy varmint barrel out for a BHW P3 1/10" twist heavy sporter bbl, 22" long 4 months ago and now the 65g vmax spits out at at 3271 fps and the 55g varmageddon at 3329 fps with the same loads I was running in the McGowan varmint barrel 24" bbl.
This barrel prints both those right at .307" at 100 yds and at 200 yards they both ran .700" to .717", so Im happy with the swap and a bit lighter as its my coyote/antelope rig.

[yobuck]

Go back in time and you will find the 6x47 was a popular benchrest cartridge. Remington even chambered their 40x rifle for it.
At that time the 222 case was necked up to 6mm. The PPC cartridge was created by 2 shooters with names of Pindell and Palmisano.
Within a very short period of time all the other then popular benchrest cartridges were obsolete. There were 2 versions, a 22 and a 6mm.