6mm Upper?

[wisconsinteacher]

If you were to build a 6mm upper, what caliber would you pick?

 

[pyscodog]

243

 

[Bob_Atl]

243, did so with a 20" BHW barrel, vary accurate, IMO.

If you're talking AR-15 lower, then either 6x45 or 6x6.8.
I did a 6x6.8 from 20" BHW, also vary accurate, IMO.

 

[wisconsinteacher]

I was thinking AR15. Thanks

 

[bug holes]

Of all of my rifles including several 6mm calibers, I will be taking my 6x45 to a turkey shoot tomorrow. It's hands down my favorite caliber. It is laser accurate, cheap to load for and has taken animals ranging from prairie dogs to wild pigs.

 

[pyscodog]

AR15/AR10, makes a big difference. In the 15 probably 6x45.

 

[GLShooter]

243 LBC and don't look back. If I had to tone it down a 6X45.

Greg

 

[varminter .223]

6x6.8 or 6x45 if you don't need that last bit of energy and speed.

 

[yotehunter243]

6x45 for the easy of cheap brass. I've killed a truck load of coyotes with 6x45, 6x6.8 and a few with 6DTI. Out to 400 yards the 6x45 dropped them just the same.

 

[wisconsinteacher]

The more I study, the more I am leaning towards a 6x6.8. Now to find or build and upper!!

 

[steve garrett]

I think I might just quit dinking around and go 243 wssm

 

[varminter .223]

Bca sidecharge

 

[jasonprox700]

I have a 6x6.8 (14.5”) and a 6x45 (12”). Both barrels are from X Caliber. I’ve only shot a couple loads in the 6x45, but it shoots lights out, handles great with my F1 suppressor, and it’s already killed a coyote. I have not had a chance to shoot my 6x6.8 yet.

I had a 243 WSSM at one time. 20” Shilen from Dtech. Great shooting and handling gun, but the proprietary parts and lack of brass kind of scared me away. Now I kind of wish I would have stuck with the platform. Still think a 16” 300 WSSM would be the cat’s @ss for woods hunting and deer drives!

 

[zr600]

I say 6x6.8 or 243lbc either would be good. Go with ritch the forum sponsor. Will work on game up to deer.

 

[cmatera]

I have a 6x45, but if I had it to do again, I'd go 243LBC.

 

[Varminterror]

Pick your poison for 6mm Grendel variants. I’ll likely go 243LBC for my next barrel, but only because the Turbo is proprietary.

 

[cmatera]

I have a .264 LBC too and like it enough that I wish I did the .243 LBC.

 

[204 AR]

Another 243 lbc vote. I actually have two, a bhw from Ritch, and a 6 predator from arp. Both 1-8", 22" long, both shoot virtually the same load to the same speed more or less. Both are deadly accurate and are my go-to's for coyotes and long range pdogs.

Also another 243 wssm vote if you want a significant step up in horsepower. At the expense of a lot of extra powder, way less barrel life, and less mag capacity. My Dtech is also 1-8", 22", (see a pattern here?) and is a flat out laser.

 

[DiRTY DOG]

6DTI. Also Shilen and PM sponsor Dtech make a great barrel/upper. Or you could gamble on a lesser barrel.

 

[kswaterfowl]

I love my 6dti. I haven't had a chance to kill any coyotes, but I've stretched it out to 450 yards. And it was a breeze to ring steel with 55gr noslers. Hopefully I can see how it does at 600 and 800 this weekend.