sestoppelman
AH ambassador
New to me anyway. Here is the just purchased 2009 vintage Ruger .416 Rigby. Got a good snag on a little ammo, brass and dies from the same GB seller, it all came today and I also got a snag on some Hornady old style 400 gr bullets off GB, should be here tomorrow. Rifle is about 98 percent condition and the seller offered to dicker when I asked a couple questions about it. Got a good deal on it. Scope is mine off another rifle.
As Bullthrower mentioned, the .416 seems like the perfect chambering for the RSM. Mine loves those 400 gr Hornady RN's. I believe the Gen 1 had a 24" barrel and a barrel band set back in the fore end. Later generations were shortened to 23", a smart move in my opinion - they're nose heavy enough already, and the barrel band placed where it belongs. Yours sounds like a very late production model.

I do wish that Ruger would recognize that these big rifles have noticeable recoil
and put a decent pad on them!
Honestly.