No they are not.
I just replaced the plastic grip on my 50th Anniversary 357 Mag with the factory rosewood grip and they feel about the same size. The smooth wood grip did feel 100% better than the original plastic grip.
If you want a fuller grip,, check out CLC grips or Pvt Schultz, (Plus there is another maker I can't remember right now that's a member here.)
Custom grips are the stuff to fit your hands & look good.
James, its so cold in NC that tyrone forget 41mag. Go to the auction section here and look them up. Cary is www.clccustomgrips. Yes go with the wood.
Tyrone, its cold and rainy here for a change.
Eric
Do any of the custom makers make a grip that is the same size as the new Lipsey's? I really like the way it feels in the hand, but it would be much better looking with Holly or maple I think!
Forum member 41 Magnum makes both regular-sized grips for the 50th anniversary guns (I really need to memorize the grip frame name), as well as "extended" panels that are almost Bisley-esque: