6mm?
- Thread starter TTU97
- Start date
Yeah,I'd have to agree,I do believe 6mm and 243 are just about the same.
FULLDRAWXX75
Well-Known Member
diameter wise, 6mm is .236
en.wikipedia.org/wiki/6_mm_Remington
FDXX75
en.wikipedia.org/wiki/6_mm_Remington
FDXX75
Tikkabuck
Well-Known Member
Ballistics Results
Cartridge Information
Index Number Cartridge Type Weight (grs.) Bullet Style Primer No. Ballistic Coefficient
R243W3 Remington� Express� 100 Pointed Soft Point Core-Lokt� 9 1/2 0.356
R6MM4 Remington� Express� 100 Pointed Soft Point Core-Lokt� 9 1/2 0.356
Velocity (ft/sec)
Cartridge Type Bullet Muzzle 100 200 300 400 500
Remington� Express� 100 PSP CL 2960 2697 2449 2215 1993 1786
Remington� Express� 100 PSP CL 3100 2829 2573 2332 2104 1889
Energy (ft-lbs)
Cartridge Type Bullet Muzzle 100 200 300 400 500
Remington� Express� 100 PSP CL 1945 1615 1332 1089 882 708
Remington� Express� 100 PSP CL 2133 1777 1470 1207 983 792
Short-Range Trajectory
Cartridge Type Bullet 50 100 150 200 250 300
Remington� Express� 100 PSP CL 0.1 0.7 zero -2.0 -5.4 -10.4
Remington� Express� 100 PSP CL 0.0 0.6 zero -1.8 -4.8 -9.3
Long-Range Trajectory
Cartridge Type Bullet 100 150 200 250 300 400 500
Remington� Express� 100 PSP CL 1.6 1.5 zero -2.9 -7.5 -22.1 -45.4
Remington� Express� 100 PSP CL 1.4 1.3 zero -2.6 -6.7 -19.8 -40.8
Cartridge Information
Index Number Cartridge Type Weight (grs.) Bullet Style Primer No. Ballistic Coefficient
R243W3 Remington� Express� 100 Pointed Soft Point Core-Lokt� 9 1/2 0.356
R6MM4 Remington� Express� 100 Pointed Soft Point Core-Lokt� 9 1/2 0.356
Velocity (ft/sec)
Cartridge Type Bullet Muzzle 100 200 300 400 500
Remington� Express� 100 PSP CL 2960 2697 2449 2215 1993 1786
Remington� Express� 100 PSP CL 3100 2829 2573 2332 2104 1889
Energy (ft-lbs)
Cartridge Type Bullet Muzzle 100 200 300 400 500
Remington� Express� 100 PSP CL 1945 1615 1332 1089 882 708
Remington� Express� 100 PSP CL 2133 1777 1470 1207 983 792
Short-Range Trajectory
Cartridge Type Bullet 50 100 150 200 250 300
Remington� Express� 100 PSP CL 0.1 0.7 zero -2.0 -5.4 -10.4
Remington� Express� 100 PSP CL 0.0 0.6 zero -1.8 -4.8 -9.3
Long-Range Trajectory
Cartridge Type Bullet 100 150 200 250 300 400 500
Remington� Express� 100 PSP CL 1.6 1.5 zero -2.9 -7.5 -22.1 -45.4
Remington� Express� 100 PSP CL 1.4 1.3 zero -2.6 -6.7 -19.8 -40.8
ratsnakeboogy
Well-Known Member
When the 6mm was first introduced it was called the .244 if that tells you anything. Almost identical.
FULLDRAWXX75
Well-Known Member
ratsnakeboogy said:
Almost identical.................decimal size. and that is the only similarities.
FDXX75
ratsnakeboogy
Well-Known Member
I respect your opinion fulldraw, and I've had enough debating for this week.
I really don't see a huge difference in ballistics between these two rounds. I've owned both, and performance on deer with the same projectile is about the same. The 6mm has a small advantage over the .243, but not enough to tell much of a difference. I found the 6mm to be more accurate in both factory and handloaded ammunition, but others seem to find the opposite result. On paper the 6mm is the better round, but real world they perform about the same. Just not enough difference to argue over.
I really don't see a huge difference in ballistics between these two rounds. I've owned both, and performance on deer with the same projectile is about the same. The 6mm has a small advantage over the .243, but not enough to tell much of a difference. I found the 6mm to be more accurate in both factory and handloaded ammunition, but others seem to find the opposite result. On paper the 6mm is the better round, but real world they perform about the same. Just not enough difference to argue over.
mr.big
Well-Known Member
if you reload and have a 24 inch bbl or preferably a 26 incher you can really tilt the can on the 6mm,,it is closer to the 240 Weatherby than the 243,,I could get almost 3300 fps with 100 gr bullets in my 700 VLS with RL22 and IMR 4831,,3700+ was easy with 70 NBT and IMR4064 ,,my favorite load was the 87 Hornady BTHP and a caseful of RL 19 for 3450 fps,
I have a Model 7 with 18 inch bbl that will do 3000 with the 95 NBT and RL 19,,I can`t get but about 2900 with the 243 and 22 inch bbls..
with 100 gr bullets the 6mm Rem is almost as hot as the 25-06..
I have a Model 7 with 18 inch bbl that will do 3000 with the 95 NBT and RL 19,,I can`t get but about 2900 with the 243 and 22 inch bbls..
with 100 gr bullets the 6mm Rem is almost as hot as the 25-06..
FULLDRAWXX75
Well-Known Member
Thanks Mr Big
FDXX75
FDXX75
I'm a handloader so I do not see it as similar. To the non-handloader there is a huge difference. The number one difference is finding factory loaded ammunition for a 6mm...not impossible but very expensive when compared to the .243
FULLDRAWXX75
Well-Known Member
My point being..........I have heard a .308 and the 7.62 are the same, the .223 and 5.56 are the same and now the 6mm thing.
Some people have no knowledge of such things and take words they read as gospel then go out and use the misinformation to hurt themselves or others.
OK, not so much on the 6mm topic but there are very distinct differences between the 6mm and a .243. It's like saying a 30/06 is the same as the .308, they both take 30 cal. bullets.
I am not looking for arguements, but when it comes to information that can hurt people, "close enough" is not in my vocabulary.
FDXX75
Some people have no knowledge of such things and take words they read as gospel then go out and use the misinformation to hurt themselves or others.
OK, not so much on the 6mm topic but there are very distinct differences between the 6mm and a .243. It's like saying a 30/06 is the same as the .308, they both take 30 cal. bullets.
I am not looking for arguements, but when it comes to information that can hurt people, "close enough" is not in my vocabulary.
FDXX75
mr.big
Well-Known Member
the 6mm is the 7mm Mauser case made to take .243bullets,,the 243 is the 308 made to take 243 bullets,,the 6mm will take about 5 grs more of a slower powder that really makes a big difference..
with th e real light 55 gr bullets there is little difference,,but with 87 and up the 6 is way faster..
with th e real light 55 gr bullets there is little difference,,but with 87 and up the 6 is way faster..
ratsnakeboogy
Well-Known Member
Ok, maybe I'm confused on what the original question was?
I said they were very close to the same performance wise, NOT THAT THEY WERE INTERCHANGEABLE. Sorry if it sounded that way, I also don't want anyone hurt.
Having said that, I have also reloaded for both, and unless you EXCEED recommended max loads, ballistics are very similar for both rounds.
If you load it HOT that's your business, but in the same barrel length, allowing for pressure limitations you won't see a huge difference. 150 to 200 fps is not a huge difference to me, considering the 100 grain psp is a hunting bullet. Now if you're taking shots at deer at 600 yards you may have a slight advantage.
Let me know how that works for ya'. I can't shoot that far, and be consistant.
I don't think the original poster has any intention of pushing the limits of the 6mm on the reloading bench, although I could be wrong? I think he was just asking what a comparable round would be, and I still think the correct, real world answer to that question is the .243 Winchester.
I also don't think he's looking at a rifle with a 24 or 26 inch barrel, that is an assumption on my part, but probably not likely. Look at Tikkabuck's ballistic chart and honestly tell me there is an arguable(real world) difference.
You may be able to hop-up the 6mm to close the gap between it and the 25/06 remington, but I don't think that's what he's asking here.
Sorry if am offending anyone, sometimes I think we take a simple question and make it almost silly by arguing tiny points.
I said they were very close to the same performance wise, NOT THAT THEY WERE INTERCHANGEABLE. Sorry if it sounded that way, I also don't want anyone hurt.
Having said that, I have also reloaded for both, and unless you EXCEED recommended max loads, ballistics are very similar for both rounds.
If you load it HOT that's your business, but in the same barrel length, allowing for pressure limitations you won't see a huge difference. 150 to 200 fps is not a huge difference to me, considering the 100 grain psp is a hunting bullet. Now if you're taking shots at deer at 600 yards you may have a slight advantage.
Let me know how that works for ya'. I can't shoot that far, and be consistant.
I don't think the original poster has any intention of pushing the limits of the 6mm on the reloading bench, although I could be wrong? I think he was just asking what a comparable round would be, and I still think the correct, real world answer to that question is the .243 Winchester.
I also don't think he's looking at a rifle with a 24 or 26 inch barrel, that is an assumption on my part, but probably not likely. Look at Tikkabuck's ballistic chart and honestly tell me there is an arguable(real world) difference.
You may be able to hop-up the 6mm to close the gap between it and the 25/06 remington, but I don't think that's what he's asking here.
Sorry if am offending anyone, sometimes I think we take a simple question and make it almost silly by arguing tiny points.
ratsnakeboogy
Well-Known Member
The MCDH said:
Did I read it wrong?
mr.big
Well-Known Member
they are similar that they shoot the same bullet and with factory ammo the 243 is probablly the closest,,
but to me they are as different as the 308 and 30-06,,I load everything to its potential,,and the 6mm is a hoss of a round.
but to me they are as different as the 308 and 30-06,,I load everything to its potential,,and the 6mm is a hoss of a round.
