The 6 mm Advanced Rifle Cartritage.
- Thread starter CWLONGSHOT
- Start date
Josh
Well-Known Member
Unless you just have a hankering to shoot sewing needles, most of your classic varmint bullets will shoot flatter to 300 yds than the modern VLD bullets.
CWLONGSHOT
Well-Known Member
I ran some numbers in a Ballistic calculator the other day. Pretty interesting.
That lil thing is quite efficient.
When I was building my 6 mm Rem its amazing the prejudice for the 243. I call it that for lack of a better name. The 243 out speeds it in every manual. WHY?? The 6 Rem has much bigger case and case cap. Loaded to same pressures it cannot be "less". I think thats it no matter whats claimed the data is run at lower pressure.
CW
That lil thing is quite efficient.
When I was building my 6 mm Rem its amazing the prejudice for the 243. I call it that for lack of a better name. The 243 out speeds it in every manual. WHY?? The 6 Rem has much bigger case and case cap. Loaded to same pressures it cannot be "less". I think thats it no matter whats claimed the data is run at lower pressure.
CW
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RBHarter
West Central AR
I wonder if cartridges fall into a glitchy area of gas volume , pressure rise and relief times .
Powders that work perfectly in the 300WM with a compressed load just reaching or just under the maximum limit will eat a barrel in the 7mm RM or 264 WM , gaining nothing in a Weatherby . They're well off peak in 338 WM and don't reach cleanup in the 458 .
Then there's the same thing in case capacity .
The x57/Mauser clan data until the mid90s was deferred to the 48kpsi limit for the 93/95 Mausers , the Spanish especially.
That would certainly validate the 244 being beat up by the 243 and it's higher pressures .
Have you ever tried to stretch a 308 clan out to x57? If you run it into the correct die to establish the case taper then a smaller body die you can actually get about 1/3 of the neck on a 7x57.
The 6.5 CM will stretch right up to 6.5×50 . The point being that the case volume difference isn't as big gas it looks like it is .
Powders that work perfectly in the 300WM with a compressed load just reaching or just under the maximum limit will eat a barrel in the 7mm RM or 264 WM , gaining nothing in a Weatherby . They're well off peak in 338 WM and don't reach cleanup in the 458 .
Then there's the same thing in case capacity .
The x57/Mauser clan data until the mid90s was deferred to the 48kpsi limit for the 93/95 Mausers , the Spanish especially.
That would certainly validate the 244 being beat up by the 243 and it's higher pressures .
Have you ever tried to stretch a 308 clan out to x57? If you run it into the correct die to establish the case taper then a smaller body die you can actually get about 1/3 of the neck on a 7x57.
The 6.5 CM will stretch right up to 6.5×50 . The point being that the case volume difference isn't as big gas it looks like it is .
CWLONGSHOT
Well-Known Member
I chambered a 1:8 barrel to 6Rem. I seriously considered removing body taper and moving shoulder forward shortening neck to bore dia. But I wanted a 6Remington. Briefly considered the 6 Creed but again. I wanted a 6Rem. What I did do was the afore mentioned 1:8 24" barrel and because I was using a long action. I seated the 108 Berger to its base in. The neck and had chamber throated for long seated bullets.
Then I load to I see pressures and backoff. So fat I can send a 105 Speer to almost 3200 fps.
Then I load to I see pressures and backoff. So fat I can send a 105 Speer to almost 3200 fps.
CWLONGSHOT
Well-Known Member
Here is my stock all ready ta mount!!
todd
Well-Known Member
looking good!!! i don't have any Boyds, i got Richards and High Plains gunstocks.
i have to redo my pictures, but here's a Sapphyre laminate from High Plains, 20 Vartarg if your interested. there is also a 444 Marlin barrel.
i bought a Richards Wolverine gunstock in Apache Golden, but i think that the rifle is too heavy, it is 9 or 10lbs. i should have shaved some weight on the stock. it is bulky!!!
i did Minwax Antique Oil, about 2 or 3 coats. then polyurethane oil semi-gloss and mineral spirits (3 poly: 1 spirits) about 2 or 3 coats. i don't do wipe on poly, its too expensive when you can do poly oil/spirits for $10-15 less.
i have to redo my pictures, but here's a Sapphyre laminate from High Plains, 20 Vartarg if your interested. there is also a 444 Marlin barrel.
i bought a Richards Wolverine gunstock in Apache Golden, but i think that the rifle is too heavy, it is 9 or 10lbs. i should have shaved some weight on the stock. it is bulky!!!
i did Minwax Antique Oil, about 2 or 3 coats. then polyurethane oil semi-gloss and mineral spirits (3 poly: 1 spirits) about 2 or 3 coats. i don't do wipe on poly, its too expensive when you can do poly oil/spirits for $10-15 less.
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CWLONGSHOT
Well-Known Member
VERY VERY NICE!!! 
CWLONGSHOT
Well-Known Member
I got the call tonight. My rifle came in.!!
I'll go pick it up tomorrow! CW
I'll go pick it up tomorrow! CW
CWLONGSHOT
Well-Known Member
CWLONGSHOT
Well-Known Member
This just happened...
CW
CWLONGSHOT
Well-Known Member
Elpatoloco
Active Member
Ok damn it.
Never heard of this rascal.
What are the details on your loads as far as speeds and mould?
I don't cast for bottleneck rifle type calibers. Looks like a fun rig to turn some money into noise and likely decent hunting caliber at shortish range.
CWLONGSHOT
Well-Known Member
The "blue" bullet is a RCBS 95g mold and the Blk is a NOE 106g mold.
One is loaded (to test) W IMR 4198 and other (to test) W Trail Boss.
( Both have GC removed for safe suppressor use)
Haven't shot yet.
CW
One is loaded (to test) W IMR 4198 and other (to test) W Trail Boss.
( Both have GC removed for safe suppressor use)
Haven't shot yet.
CW
CWLONGSHOT
Well-Known Member
Quick range trip with ARC today.
Shot two ladders.
First 95g SST poor at best. First bad groups I have had..
Second was a 85g Soerra and these shot well. Worst was a inch but four of the six shot under 3/4"!
Best group seen here in a 5 shot
Shot two ladders.
First 95g SST poor at best. First bad groups I have had..
Second was a 85g Soerra and these shot well. Worst was a inch but four of the six shot under 3/4"!
Best group seen here in a 5 shot