Throat length has shrunk as shown in many modern rifles.
Measurements I have collected from gun writers. I do not know trimmed case lengths.
.250 inches Ruger M77 MK II Dave Scovill
.280 inches Rem. BDL Classic, Mike Venturino
.290 inches Winchester M70, Bob Hagel
.267 inches Rem. 700, Ken Waters
.295 inches Ruger MK II Dave Scovil
.495 inches Ruger 77 (1975) Dave Scovil
Friends, 24HR Campfire members and my measurements with 2.225 inches trimmed cases
.275 inches Rem. 700 BDL
.277 inches Ruger M77 MK II
.283 inches Ruger M77 MK II
.290 inches Winchester M70
.292 inches Win. M70 action, Buhmiller barrel
.305 inches Winchester M 70
.325 inches VZ24 action, McGowen barrel
.337 inches Ruger M77
.350 inches M98 (1935) SIG barrel
.353 inches Ruger M77
.395 inches Ruger M77