Re: Borden Alpine Repeater in .260 Remington
No sir, but my own experience shown the 6.5x55 having about 30 fps per inch reduction from 24 to 21" over a Chrony (and it's within 2 grains case capacity of a 260), so I am confident this will give within 40-50 fps of an identical 24" rifle.
Speeds would be expected in the 2750-2800 range, or a tad more. Some are using RL17 which gives another 100fps or more. But no, never ran any over a chrony, sorry.