I had mine built on a VZ24 action as well. It's a 1;10 twist for the 140gr bullet. I don't know what the throat measurements are however I havent found a 140gr bullet it doesn't like. I wish I could figure out how to post pics of it.
As I posted previously in this thread you can do a simple test to determine approximate throat length. Invert a flat base bullet in a 2.225 inch trimmed case, chamber it and close bolt. Some guns I have sampled for comparison.
.325 inches VZ24 action, McGowen barrel
.420 inches 1895 Chilean
.420 inches M98/08 Brazilian
.438 inches " "
.442 inches " "
Other measurements I have collected from gun writers. I do not know trimmed case lengths.
.250 inches Ruger MKII (circa mid 2000s) Dave Scovill
.289 inches Rem, BDL Classic Mike Venturino
.290 inches Winchester M70 Bob Hagel
.267 inches Rem. 700 Ken Waters
.Friends and 24HR Campfire member measurements. 2.225 inch trimmed case.
.275 inches Rem. 700 BDL
.290 inches Winchester M 70
.292 inches Win. M70 action, Buhmiller barrel
.305 inches Winchester M 70
.337 inches Ruger M77
.350 inches M98 (1935) SIG barrel
.353 inches Ruger M77
.395 inches Ruger M77
