Beware that Truetones can be rather mouthpiece picky, I always found the intonation to be best with the stock Buescher mouthiece. The main area of dodgyness to look out for is across the register break, C# - D.
I'm kind of intrigued as to why you specifically want a metal mouthpiece?
I use to recommend players that want a modern designed mouthpiece on an older sax to try and play it in the same situation that they use to play! I don't recommend a young saxplayer, who is into classic saxophone to play a BL metal w 0 chamber, on a Buescher TT. Most teachers or audience don't want a classic saxophone to sound like that.
I talked to a player who is proffesionally teaching and playing classic saxophone about modern designed mpc's vs traditionlly designed mpc's (like the original) on saxes from the 20's or 30's. He told be that most players have intonation problems when they play a modern mouthpiece on an older horn. They might also have problems with playing out of tune over the whole register. He don't recommend or allow his students to use modern (metal) mouthpieces. Beside intonation problem you may also lose the character of your sax. He is very picky! He also told me about the same problem that PT is saying.
Another guy, also a teacher and player in contemporary saxophone, told me that it can be ok to use a modern mouthpiece and an older sax. If you're playing sax in a 4-horn section in a Rock-Blues Band maybe the audience don't notice? The problem is when you are going to play or trade solo. Let's say you're trading solo with a guy who is playing a modern horn w modern mouthpice. Then it's your turn with a small bore old saxophone with a modern mouthpice. There is a differnce in the sound. Even a pub/club audience notice.
So it's more a matter of how and where you are going to use the metal mouthpice. I can use a metal Dukoff D chamber on my C saxes when i'm playing along with my wife in our home parlor. Noone care or notice!?!? There is a big difference playing in a church for a quiet audience or doing a gig with bouncy Rock-Ska-R&B-band at a club.
Thankyou for your advice, as I play in the Ipswich Hospital Band and all the other Tenor sax players use metal mouthpieces they drown me out with my Rousseau mouthpiece. So thought I'd give one a go, but now I think I will stay as I am as It has a lovely sound. My sax never came with a mouthpiece so will have to look around for a Buescher mouthpiece.
Once again thanks Steve
I had excellent results with a Yanagisawa 7 metal on my True Tone alto. Had no tuning problems at all. The Yanagisawa is loud, powerful, brightish without being strident, well made and not too expensive.
Thankyou for you kind advice I will stick with the Rousseau it's a number 6 opening. My reeds are Alexander New York, they work well together. I will also work on my breathing to. Also I am using your book Taming the Saxophone finding it very helpful.
So once again thankyou for your help Steve