How fast is to fast

[Cade]

shooting a 6CM with Berger 105 at speeds 3146 to 3156 with 41.5gn H4350 in a 26" heavy palma barrel with 7.5 twist. How fast is to fast. What is barrel life expectancy.

 

[steve123]

In the 1500 region but don't bring it to a match past 1200 or so.

 

[carlsbad]

If your ES is 10, you're not too fast.

 

[77racer]

This is a screenshot of the email i received from Berger when i had the same questions.

 

[#40Fan]

Can it ever be too fast?

I am pushing 110 SMKs at 3190 in a 7 twist .243 AI and I still have room to go higher.

 

[Cade]

If your ES is 10, you're not too fast.

When I loaded the Hornady 103 I had a ES of 3 and SD 1.4 still pushing 3132-3135 3 shots

 

[Shawnba67]

Can it ever be too fast?

I am pushing 110 SMKs at 3190 in a 7 twist .243 AI and I still have room to go higher.

I had a 30" 6 groove 7 twist sammi 243. with 46gr of rl26 i could get 3300fps. pressure at 47 but close to 3400. however the RPMS are nuts. I had several failures of bullets.

 

[NorCalMikie]

No matter how fast it is, you'll never be able to out run it.
FPS and ES or SD doesn't mean "JACK" if it wont group like you want it to.
A five shot group that can be covered with a dime is a good starting point.

 

[Cade]

On my 6 CM I Think I have a really fast barrel, I seated my bullets in a little farther as they were into the lands and still running 3150ish. Then loaded down from 41.5 to 39.8 and the speeds dropped down to about 3045 and shot good as did the higher load. Then shot some factory Hornady 103 ELD X and they were also running about 100 fps faster then what the box said.
Have a real tight chamber as even the factory are jamming and I have to reseat them a little deeper also.

 

[nmkid]

I had a 30" 6 groove 7 twist sammi 243. with 46gr of rl26 i could get 3300fps. pressure at 47 but close to 3400. however the RPMS are nuts. I had several failures of bullets.

Wow! That's really impressive with a standard .243.

 

[Shawnba67]

Wow! That's really impressive with a standard .243.

I really wished it had worked out! Took me way to long to figure out the electronic targets werent the problem with scoring 9s 10s and clean miss's

 

[#40Fan]

Wow! That's really impressive with a standard .243.

Reloder 26 is like crack!