The SAAMI specs on the reamer throat is very simple. The reamer cuts a .3138# "lead" diameter imediately foward of the casing mouth. From the caseing mouth, that .3138 cut is a straight taper of 1 degree to .300 ( I.D. of the lands).# It takes a distance of .730 for the initial .3138 "lead diameter" to stop cuting the 1 degree angle into the bore and lands.# I examinded and mic-ed 12 factory loadings. All the bullets no matter what grain appeared to have the same bullet side wall geometry foward the caseing mouth. This means all the various factory loads will use the same factory "ogive" distance of .175" . The ogive is the distance the bullet moves from its position in the caseing to contacting the lands. The bench loaders NEVER, NEVER start working up a "target Load" with a .175 ogive. It is typicaly .035 for a starter and then with the desired velocity at hand, they close that .035 or .040 (at most) ogive distance to a sweet spot somewhere between the .035 and .000 (land contact). Different powder and bullet wieghts react somewhat differently in starting chamber pressures depending on the "ogive" distance.
Out of the 12 factory loads there were 6 different bullet diameters used. Fiocchi 123g,FMJ of .308 to Herters 154g,SP of .311. The majority being .310.
The factory Lead Diameter of .3138 is so freakin large that you need a long throat to get back down to bore diam. That is the only place the Clymer tech would modify the reamer. He would recut the lead diameter to a smaller diam but refused to change the 1 degree angle. I wanted to still end up with a chamber safe to use all the various factory loadings but not Mack Truck mil spec. So I may just let them recut the lead diameter to .3112 with the same 1 degree angle. That alone should cut the ogive length by .075, leaving .100 of jump. Still not exactly what Im after, but heading in the right direction. Its only $35 bucks to have it recut.
# Sorry to interject all this into your post, but this may be your end of the day holy grail. I originaly thought I had a .150 ogive but remeasuring it in a brand new Yugo barrel like yours and an old shot out one, I came up with a ogive of .175 in both chambers. to illustrate this, the round at the top is factory live and the bottom one is unfired, powder removed and the bullet is exactly up to where the lands begin to touch the jacket. behold, an ogive of .175......