FredC wrote on Oct 30^th, 2015 at 2:54pm:

. . .On your chart with the software estimate pressures it has a 250 grain bullet and not the 220 grain I intend to use. Is that correct? If so then 45 grains of varget with a 220 grain bullet should really be in a safe territory. . . I have also given some thought to this apparent equality of the 308 30/40 at 40K cup and thought about the difference in the shoulder angle. This will become less of a difference with 35 caliber as there is a lot less shoulder remaining. . . I have a theory why some of these old Krags may be developing more bolt thrust with what should be safe loads. On the barrel that I took off this gun the chamber was .010 oversize for some distance from the rim. Could it be the case can not swell enough at that point to grip the barrel and allows the case to stretch and slide back with too much thrust on the bolt?

1. If you want more precise estimates from QL, you have to provide the overflow water capacity, as suggested earlier. Please note that I'm just providing examples of what you could do with QuickLOAD.

2. Shoulder shape/angle has been consistently demonstrated to have negligible effect on pressure with normal loads of conventional components in cases of equal volume.

3. Chamber .010" over case body diameter is completely normal. SAAMI minimum cartridge base: .453", maximum chamber base: .464". This has no practical effect on case/chamber adhesion or "bolt thrust".