Quote Originally Posted by harvey_s View Post
Cannot agree - the new shape Senior knocks it into a cocked hat for quality of manufacture IMHO.

With regard to the OP's original question though - Funnily enough I took my Tempest and Senior to the club this week to have a play before a vintage pistol competition.
Over the chrono the Tempest averaged 419 fps over a 5 shot string and the Senior with a NOS leather and brass breech seal averaged 440 fps again over a shot string which I was chuffed at.
Physcially the Senior is a much more compact gun and feels better in my hand, they both have heavy triggers but the Senior has a longish creepy pull which is a function of the trigger design (this can be geatly reduced with careful polishing if you wish)
That said it doesn't seem to affect the gun adversely and I could actually produce tighter groups with it.
There are a lot more non-functioning Seniors in people's cabinets than non-functioning Premiers.......