Bouncing hammers.

[victor belanger]

Hello all,

May I indulge with y'alls expertise.
I have a Mason & Hamlin concert grand here that in the bass, the hammers
bounce quite a bit after the note is being struck and the hammer returns to
the rest rail. In fact it bounces so much that on a staccato blow sometimes
it can hit the string/s again. I have a pianist that pointed it out to me.

I played around with the adjustable hammer rest rail. If the rail is close
to the hammers, it seems like it is worse. The only deduction I can come up
with is that the hammers are too heavy. But really they are not.
BTW. The pinning is fine.

How can I avoid this problem? Why is it doing it only in the bass?

Thanks.

Regards.

Victor