A 6br is no dasher
Add 200fps to your number and your in dasher territory.
Now, the fun one that I have is a 22 dasher...throated for 90's running about 3100...that is a 6mm killer and it's shooting tiny. Only bad thing, it's got little over 300 rounds and the throat looks like a 6 dasher with 600-700 rounds in it...so I don't suspect it will last long and I'm not standing on it.
Enjoy it, it'll be the most fun gun you have to shoot.