A gun with 30" tubes, regardless of weight, would be a bit of a struggle in most grouse and woodcock thickets, Stan. Particularly, in early season.
You could do it, it just wouldn't be the best tool for the job.
I have a few guns with 28" tubes that I hoped would be a decent compromise for combined use for pheasants, grouse and woodcock. But, they were mostly just a compromise, and not the best tool for either job.
So it goes.
Best,
Ted