You may want to lighten your load up a little.
Actually, he had better drop down 3 to 5 grains. That's a big case and one or two grains will still mean high pressures. Just because a load is listed in a manual doesn't mean it is safe in
your firearm with
your components. Too many shooters just go to the max load in the book and put up a box....wrong! Always start low and work up; this accounts for temperature like mentioned above, but it also takes into acount your particular barrel, brass, powder lot and primers. All these effect a load's performance and pressure.
New reloaders should read the first 100 pagesin the maual before they ever get to the load data. Had the poster done this he'd know what the problem was.
You certianly don't need 2457 fps with a 400-grain bullet for anything on this contenent. If you can't do it with 2350 fps, then I'd take up another sport. :wink: