6mm CM

Slimbo said:
Except the OP clearly reloads and is planning to for this project so the factory ammo point is moot.
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But he also clearly is looking for a factory rifle....which in .243 is 90% 1-10 twists....which limits you to sub 100 grains....
 
JEC said:
Given that the 6 CM and 243 Win shoot identical bullets, with the 243 being capable of the higher velocity ... how can the 6mm Creed “double the energy...”?
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And here we see a man who doesn't know how to do math. Or even plug numbers into a ballistics program.

Most things in the gun world have trade-offs. Higher velocity causes higher recoil. Burning more powder in the same bore diameter burns the barrel out faster. Heavier guns reduces recoil but isn't so nice to carry all day. Etc.

One of the few things that is purely beneficial with zero downside is a higher ballistic coefficient for your bullet. You can argue all day whether someone "needs" a higher ballistic coefficient for their particular shooting or hunting but the fact remains that it's a good thing.

I don't have a 6 CM but I have both a 243 and a 22 CM. Even my 1:7 twist 22 CM carries more energy downrange than my 1:9.25 twist 243.
 
You can shoot 105’s out of most 243 Winchesters built these days. Remingtons are 1-9.125” twisted iirc. The length of a 105 bullet seated in a 243 isn’t too long either. Lapua brass too.

The Creedmoor tried to enter the crowded 6mm space and failed. I tried to order one in a weatherby lw a while back and weatherby told me they are no longer making them. Saved me a another set of dies.
 
Xs24-7 said:
Congrats on your google skills.
Have you loaded 105s in a .243? Did they fit in your magazine? If they did, do you know how much powder capacity you took up with the long bullet seated deep? How well did it shoot seated so far off the lands? What was your BC degradation due to the slower twist?
I get it, you could build a custom .243 that would mostly get you what you get out of a 6mm....that’s not really the point....
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Yeah, I have a stack of 105 Amax been shooting for years, and they shoot just fine. Not hard to load to mag length, and they produce higher velocities then I get out of my 26" 6mm CM heavy barrel out of a 24" hunting barrel.
 
Xs24-7 said:
At 500 yards my 105 Berger has almost 2x the energy of a 95 grain SST. I’m sure it’s over your head and your just arguing to suit your ego. I guess you could build a custom .243 and run the heavier billets....but then you run out of magazine room and end up seating the longer bummer back in the case, eating up the extra capacity.
I’m sure you will come back with some other reason you don’t want a 6....and that’s great for you. The OP asked about a 6 creed...
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My post was not an “argument”, I simply correctly pointed out that that .243 and 6mm bullets are identical... I was unaware that you did not know the difference between a “bullet” and a “cartridge”.
 
Anything the 243 Winchester does, in any form, the 6mm Creedmoor does as good or better. Simple as that

Nothing wrong with the 243, it's a good cartridge. It's a lot like the 270 Winchester. Very capable chamberings, but they lag behind other similar cartridges than can utilize a wider range of bullets, especially modern shaped low drag options for shooting longer ranges. If you buy ammo at Walmart, this doesn't really apply to your shooting needs
 
todbartell said:
Anything the 243 Winchester does, in any form, the 6mm Creedmoor does as good or better. Simple as that

Nothing wrong with the 243, it's a good cartridge. It's a lot like the 270 Winchester. Very capable chamberings, but they lag behind other similar cartridges than can utilize a wider range of bullets, especially modern shaped low drag options for shooting longer ranges. If you buy ammo at Walmart, this doesn't really apply to your shooting needs
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The 243 Winchester has more case capacity. It’s a faster hunting cartridge
 
I have a 243, it works perfectly for my needs. I see the science behind the CM, but the results in the field I have experienced with my 243 speaks volumes. Multiple one shot kills, animals drop in their tracks, easy to find ammo, easy to load for, easy to shoot, components everywhere--something the 6CM doesn't have yet and maybe never will.
 
bcsteve said:
I have a 1:8 .243 barrel ordered. It's going to be a fast twist .243 Win.
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Are you getting a JC bbl?

I considered doing a fast twist 243 on a 700 long action to get those bullets some extra room. I have lots of new brass plus all the Forster BR dies, neck size die and Redding bump die here so it would have saved me a bit of cash.
 
It appears to me that the trendy yuppy Creedmoor sheep are bleating again to microscopic differences. In other words, lets split hairs or nit-pic on infinitesimal. If downrange velocity and energy are of great importance with the 243 caliber, than go with the big 6's, or is it the hypnotic trance overpowers your thought process, other than Creedmoor.
 
Does it bother anyone else that there seems to be a growing number of people shooting tiny bullets at deer-sized animals from half a kilometer away and thinking it's a good practice or is it just me?
 
SuperCub said:
Are you getting a JC bbl?

I considered doing a fast twist 243 on a 700 long action to get those bullets some extra room. I have lots of new brass plus all the Forster BR dies, neck size die and Redding bump die here so it would have saved me a bit of cash.
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A Bob Jury barrel. Rebarreling a 1:14 .22-250. I have a short action Remington McMillan that been sitting for a while, might as well put it to use.
 
todbartell said:
Anything the 243 Winchester does, in any form, the 6mm Creedmoor does as good or better. Simple as that

Nothing wrong with the 243, it's a good cartridge. It's a lot like the 270 Winchester. Very capable chamberings, but they lag behind other similar cartridges than can utilize a wider range of bullets, especially modern shaped low drag options for shooting longer ranges. If you buy ammo at Walmart, this doesn't really apply to your shooting needs
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Thank you.
 
SuperCub said:
Loading data show both cartridges giving very similar velocity with similar bullets. Other than running out of mag room with the 243, there is no real advantage that the 6CM offers to the handloader.
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You don't really run out of magazine room with a 243 in a SA model 700. 105's are nearly perfect dangle. The 115's aren't terrible either.

 
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