I own a blued Magna Classic. Awesome machine except for the fact that the throats measure .427. I size lead to that diameter and despite the mismatch between throat and bore, it's a fine shooter.
I have two 29-2's. One of these is fitted with a 10" Douglas barrel. All three were fed a steady diet of max loads (21.5gr/2400/240gr jacket and lead). All are as tight as the day I bought them (new in the day).
I have no experience with the 10" silhouette model from the 80's, but I am told they were somewhat lacking.