I imagine it will be stable at 200. My Browning BPCR in .50-90 has a 1:26 twist Badger barrel and it shoots the BACO 698gr Creedmoor well at 200m. I've never shot that rifle past that distance. Too many black powder guns to play with. Today I loaded up some really short 440gr bullets I was given over 96gr of FFg to see how they do. I haven't used this rifle in a while and your posts inspired me to dig it out of the safe. :-)