I had a 20 dasher done last year with a 28 inch long 9 twist lilja. I've got the 55gn bergers at 3780 but read a disturbing post on a US site that the user had to back off to 3600fps after the pills started to disintegrate when his barrel got to 150 rounds
So I thought I might email berger
They recommended 3400fps as the max speed for the 55. I'm up to about 200 rounds.
Hope it keeps shooting
|