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Some brass is probably up to 4-5 times in one .260 and would probably expect 6-8 times but will probably loose most before then.
The .260 and Creedmoor is a very efficient case.

Sent from my...

I would be disappointed with 2800 from 147-143 as i get 2811fps from a 18" .260.
See people's results is the main reason i haven't made the move and i use 10 grns less powder.

Sent from my...

What max vol are you hoping to get with your top load of RL26.
I just ran a ladder test for pressure through my Creedmoor with the 140 targex and Hodgdon superprofrmance i got 2818fps at top top...