6mm fast twist rifle

[Shovelhead]

I have an old German rifle chambered in 6mm, the twist on the rifle is very fast, 170mm or 1:6.7 inches. The original cartridge was loaded with a jacketed round nose soft point bullet weighing 127 grains, it was 1.2 inches long. This was loaded to produce a MV of 2788 fps. With this twist rate am I going to be able to get a lead bullet to spin up fast enough to stabilize? Is anyone loading for a 6mm/243 Remimngton, should be similiar the Remington twist is 1:9.

[M-Tecs]

You will be spinning faster than non-jacketed bullets can withstand unless you keep the velocity very low. With that fast of twist a cast bullets will be a problem.

For jacketed bullets for long range competition 8 twist is the most common for up to 115 grain bullets. Most are shooting 105 to 115 grain. I did read someone was making 125 grain awhile back but I don't know anyone that tried them and if 8 twist was adequate. Those are a hybrid or VLD design so a round nose 127 jacketed may work in an 8 twist.

Personally anything with that fast of a twist is something I would not consider for cast.

http://castboolits.gunloads.com/showthread.php?25226-RPM-Threshold

[megasupermagnum]

I had a 6mm remington with a 1:10" twist barrel. My brother now has it, I'm actually loading some ammo for it as we speak. As odd as it sounds, the best bullet for that has been the 58gr V-max. It has not liked any of the 70-95 grain bullets. It does shoot quite well with the Federal 100gr factory load. It also shot quite well with the 107 gr Sierra. A member here was nice enough to send me some 115 gr cast bullets. They were very hard, and alloyed with some copper. They shot quite well at moderate velocities, best was about 2300 fps.

As was stated, that extreme of a twist rate is WAY more than needed to stabilize even a 127gr cast bullet. I would be really surprised if you get good accuracy much past 1600 fps or so.

[45-70 Chevroner]

I had a 6mm remington with a 1:10" twist barrel. My brother now has it, I'm actually loading some ammo for it as we speak. As odd as it sounds, the best bullet for that has been the 58gr V-max. It has not liked any of the 70-95 grain bullets. It does shoot quite well with the Federal 100gr factory load. It also shot quite well with the 107 gr Sierra. A member here was nice enough to send me some 115 gr cast bullets. They were very hard, and alloyed with some copper. They shot quite well at moderate velocities, best was about 2300 fps.

As was stated, that extreme of a twist rate is WAY more than needed to stabilize even a 127gr cast bullet. I would be really surprised if you get good accuracy much past 1600 fps or so.

How did the member you mentioned get the copper to mix well with the lead mixture. The melting point of copper is over 1900 degrees. It's just a question not a disagreement.

[M-Tecs]

How did the member you mentioned get the copper to mix well with the lead mixture. The melting point of copper is over 1900 degrees. It's just a question not a disagreement.

http://castboolits.gunloads.com/showthread.php?86682-Alloying-Copper-into-Lead-Tin

http://castboolits.gunloads.com/showthread.php?86230-Alloying-Copper-into-Lead

[Texas by God]

If that is the original late 1890s 6x57 Mauser cartridge that was never adopted, please post a pic of rifle and cartridge. I recall reading of one but long ago and only that once.

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[45-70 Chevroner]

http://castboolits.gunloads.com/showthread.php?86682-Alloying-Copper-into-Lead-Tin

http://castboolits.gunloads.com/showthread.php?86230-Alloying-Copper-into-Lead

That is interesting.

[Shovelhead]

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The cartridge was not the 6x57 Mauser, it was an experimental cartridge which became the 6x58 Forster(Rimless), the case dimensions are somewhat different, the 6x57 Mauser will not chamber in my rifle.