Home Forums Hunting & Shooting Hunting Rifles 6.8 SPC to 6mm ARC?

Look at the specs and wondering if a 6.8 SPC could easily be rebarreled to a 6mm ARC? Would it be hard to get to feed correctly? Would you need to open up the bolt?

The bolt face would have to be widened and possibly extractor modified. The correct magazine width and follower for each cartridge may also be different. Feeding might be a problem. Better off going 6mm SPC and using 90 grain projectiles. Easy to neck down the old 6.8 brass in one go. Dies for 6mm SPC are readily available from CH4D.

Does anyone have any data on how fast the 6 SPC will run with a 90 grain bullet?

Yes. In a 22" barrel you can get 2950 fps without going too high in pressure. However, it will depend on the length of your magazine and the throat length of your chamber. If you seat out to 2.44", 2950 fps is easy. If 2.30" then it might be a struggle. Do an 8 twist barrel.

C4HD has very nice 6mm SPC dies. The SPC has a slight edge in case capacity over the ARC, so you can use ARC data in the 6mm SPC.

And in a Howie mini, you get 5 in the mag instead of 4 with the ARC, and they feed better than the ARC. Oregunsmithing do a 6.8 SPC magazine and follower which is different to their ARC magazine and follower. Internal length is about 2.48"

Thank you all - good stuff.

Isn’t Wayne Yorks 24 York essentially the 6 SPC?

I know he did a .25 on the SPC case. But then you have 100 grain .257 projectiles which have poor b.c.'s compared to 90 grain .243 projectiles and slightly slower.

Thanks to all for this good info. I have a CZ 527 that has been re-barreled to 6.8 SPC. Thinking I might need to send it off and make a 6 SPC out of it. Would make a hell of a combo pig/deer gun.

You might find that the 6.8 SPC using 110's at around 2800 fps is actually better than a 6mm SPC with 90's at 2950 for deer and pigs. Don't underestimate the 6.8 SPC. If coyotes as well, the 90 grain 6mm would be very good.

Pass the 22 PPC AFI and hold the fluff. Hint.



SniffleKchunt hasn't ever seen or shot any of it. Pass the Lapooey brass. Hint.

Fhuqking LAUGHING!................

Dumbschidt, we're talking 6mm, not .22

SniffleKchunt,

It will only come as a "surprise" to you,that abandoning the .277" Goat Fhuqk,requires a barrel/bore swap...you "lucky" kchunt. Hint. Congratulations?!?

Due the fact that I simply shoot it all,as you Google and Guess aloud,I'll greedily take the 22PPC AFi and make it 7" RPM. Mainly because I've a "few". Hint.



Fhuqking LAUGHING!.............

Of course you would need to rebarrel your 6.8 if going to 6mm. The OP said that already....fhark you're dumb.

SniffleKchunt,

Gals who "know" and "do" as "much" as you,will ALWAYS be best served by asking questions,rather than giving "answers"...you "lucky" kchunt. Hint. Congratulations?!?

1-7.5" ARC here. Hint.




Fhuqking LAUGHING!................

Alright, I will ask a question. Do you want to tell us about what happened when you were in Oregon?

'Nother 7" RPM 22PPC AFI here...you "lucky" kchunt. Hint. Congratulations?!?



Fhuqking LAUGHING!...............

Basically, except that his requires more case forming or he'll sell you brass at $2+ per piece.

If you decide to part with that CZ 6.8 and just pick up a 6ARC, let me know.

I’ve had plans for a 6.8 SPC bolt gun for years and never made it happen.

For my hunting needs, the 6.8 fills the niche better than the ARC.

If the bulk of my hunting shots were beyond 200, I’d be all over an ARC.

You are right about the 6.8 SPC. My pig gun is a Ruger Mini 30 rebarreled from 7.62x39 to 6.8 SPC. I shoot hogs and coyotes with it and it is a hammer. I haven't reloaded for it but shoot factory 110 VMAX & 120 Sierra Pro Hunters.