Faster twist rate for a new barrel help?

[mdslammer]

Hello guys,

Been a while since I've posted. I have a .375 Cheytac with a Benchmark 32" barrel with a 1:10 twist rate.
I see new heavy solids from a few companies like CEB with a .375 gr. single feed and Berger with the .379 gr. and .407 gr.
These recommend either a 1:8 or 1:7 twist rate.

If I were to go with a new pipe with a faster twist, say 1:7, can I only use these heavier solids for my loads?
Or can I also use something lighter like a .350 gr. solid or possibly a .350 gr. SMK jacketed bullet?

Thanks for your advice. Merry Christmas.

Mark

 

[THEIS]

Hi,

I would stay away from jacketed projectiles in the 7 or 8 twist..depending on lands/groove specs, bore specs, and intended MV you will run the very high risk of ghost bullets.

Sincerely,
Theis

 

[mdslammer]

Hello Theis and thank you for your reply and help. So I pretty much would have to commit to using only "solid projectiles", correct? Would there be any problems to also use a lighter solid like a .350 gr. CEB has for example?

I'm trying to find out how many options/limitations there are for using the faster twist rate before investing the money time for load development.

Thanks again Theis.
Mark

 

[bohem]

Solids don't functionally have twist rate limits for "too fast" just too slow.
Considering the relative cost of components involved with shooting a 375 CT there's little point in shooting anything except the most capable bullet you can get into it. Hence why the market is willing to be $2.50+ for solid copper bars with noses carved on them.

All that being said I would go with an 8 or 7 twist for maximum performance. If for some reason you get a bug to shoot jacketed bullets you can download them for survival but I really wouldn't bother.

Of the bullets you mention, I would suggest adding a couple more to the list. The Flatline 361 and 400 from Warners have (much) higher BC's and have proven easy to load tune due to the design features I put on them.

 

[mdslammer]

Thanks Bohem for your info and recommendations. I'm just getting back out again after a long lay off so I'm still getting info as to
what's available for projectiles. And I concur as you say, "there's little point in shooting anything except the most capable bullet you can get into it"...
I have no issues with going with solids. I will look into the Flatline 361/400 from Warners as well.
Regards.
Mark