Same bullet two cartridges

[Ringbill27]

I have two cartridges. 308 and 30-06.
I’m trying to load the same bullet in both. What would be the reason I couldn’t get the bullet to shoot any faster in the 30-06 then the 308?

I’ve tried the same powders. Ive switched to mag primers.

Why can’t I get this bullet to go faster in the 30-06?

Faster burning powder? Slower burning powder? Is this just a slow rifle compared to the 308.

Thoughts?

 

[Axlrod]

All barrels are different- even from the same company.
A bullet and barrel combo usually will tell you what it wants to do. Pertains to velo as well as accuracy.

 

[SloppyJ]

Give us the details of your loads and maybe we can help? Sounds like the powder is the issue.