Help Please...9.3x62 Makes No Sense

[Hsk]

Classic QuickLOAD gotcha 65gr Big Game with a 270gr bullet is way over real world and heavily compressed or impossible depending on brass bullet seating.

Real data from Ramshot Western Powders and hunters pushing it max safe around 62grfor 270-286gr bullets, giving 2450-2550 fps plenty for leopard deep pen controlled expansion with the Speer HotCor.

Your overflow is because QL's default case capacity or seating depth is optimistic real 9.3x62 cases hold 74-78gr water, and with the Speer seated to normal COAL, usable space tops out around 60-62gr before crunching.

Safe plan Start at 56-58gr, work up watching pressure flat primers, sticky bolt. Most guys settle 60-62gr for great accuracy velocity without drama. The Speer 270 Hot Cor is a proven leopard killer at those speeds broadside lungs heart and it'll drop 'am quick.

You'll be golden don't chase QL numbers, trust published data and your brass.

 

[Rare Breed]

Actually I respectfully disagree. My QL showed this powder at 62 grains was at 91.7 fill rate with no compression aat 48,000 PSI far under the max PSI. I found that to be correct and problem solved when I recalibrated my scale

 

[Daryl S]

CIP for the factory round is 57,000PSI, same as the 8x57 Mauser. Of course we know with modern brass, rifles, etc, these pressures can be exceeded, and indeed are with handloads.
So, what's the vel. with the 270gr. and the 62gr. load?