Home Forums Hunting & Shooting Savage Collectors Just acquired my first Model 1899/99

You measure from the muzzle to the front of the bolt when it's closed. So yes, you include most of the receiver ring.

Here's a 24" barrel on my 99A in 300 Savage. It's a bit later than your rifle, as can be seen by the front sight ramp. That started around serial number 300,000.