New rifle, which twist rate??

[padd54]

Greetings,

I am having RND make me a rifle in 338 Lapua with a 26" or 28"
extreme match grade barrel. Which twist rate should I ask for; 1/9 or 1/10?
I will be using it for long range hunting, 500yd to 1000yd.

 

[NCsmitty]

Determining what bullet weights to shoot should be the criteria for selecting the twist.
If you use the 300gr match bullets, then a 1in9 should be used, if you want to use just 250gr bullets, then a 1in10 should be adequate.
The 250gr bullets should also work well in the 1in9.

NCsmitty

 

[padd54]

Thanks, I forgot to say I will be using Sierra 250 and 300 MatchKings.

 

[Runningman]

Sierra does testing lots of testing with twist rates on their match bullets for optimum accuracy over the years. I would suggest you contact them. My feeling is the 1 in 10 will be more than enough.

My 338 Win Mag has a 1 in 12 twist but I only use 250 grain bullets in it.

 

[Runningman]

Just looked at my Sierra bullet chart. It looks like from that Sierra recommends a 1 in 10 twist with the 300 grain MK.

 

[NCsmitty]

Lapua recommends a 1in10 twist or faster for their 300gr match bullet. Berger will be introducing an even longer 300gr VLD soon, I understand.
Bullets continue to evolve so plan ahead.

NCsmitty