In my limited experience with a 300 savage and LVR powder got more velocity than H 4895 . With shorter barrels.

But I never really did a complete expierienent comparing loss of velocity between standard and shorter barrels.
But I don't know 🤷‍♀️ If LVR can be used in your listed calibers.

Last edited by Angus1895; 01/03/21.
"Shoot low sheriff, I think he's riding a shetland!" B. Wills