The new cartridge that makes the most sense to me.

It’s finally here….https://saami.org/wp-content/uploads...2025-01-27.pdf

Whats wrong with using new better bc pills in an existing 25 06 or 257 roberts other than they are old fashioned

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Originally Posted by blip

Whats wrong with using new better bc pills in an existing 25 06 or 257 roberts other than they are old fashioned

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Same as most old clambering, not enough twist to stabilize the modern boolits

Plus freebore length doesn’t suit the higher BC bullets. Often the freebore diameter of those chambers isn’t ideal either.

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Originally Posted by grandpamac

Greetings again,
I looked up the article on the 250 Savage Improved. It was written by Layne Simpson and he had a barrel made for a switch barrel Varmint master action in 1981. Comparing Layne's cartridge and the 25 Creedmoor showed little difference with the Creedmoor having slightly less body taper. Layne had gone with a 30 degree shoulder rather than the Ackley version for ease of feeding. Length to the base of the neck was identical. The big difference was the barrel twist of 10" rather than somewhere around 8" for the Creedmoor.
So there we have it. The .25 Creedmoor existed over 40 years back, it just wasn't called that.
Regards Grandpamac.

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Apart from the fact that brass and bullets have improved several fold since then.

The real revolution has been shooting a high (and consistent) BC bullet at a speed between 2650-2800 and watching your bullet trace to see hits. Add the beneficial effects of a moderator/supressor or brake and the effect is compounded.

Having a light bullet screaming along at 3k+ fps only to miss, make a huge noise and heat your barrel up to mirage point in one shot is pointless.

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Originally Posted by blip

Whats wrong with using new better bc pills in an existing 25 06 or 257 roberts other than they are old fashioned

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You don't need huge speed for the high BC pills to be effective. Better to use a more efficient cartridge that fits in a factory rifle with no modifications or custom barrel/chamber. Buy ammo off the shelf.

The 6ARC is very alluring for this reason. In the USA you can get 20 rounds of Hornady Match for USD $20-30, buy a rifle off the shelf and go shoot 600m+