I don't want to corrupt this thread but I'm curious; how did you get a rolling block to accept a 3 1/4" cartridge? I have a 45-90 WCF rolling block and it barely accepts thar 2.4" cartridge.
Seating depth definitely has implications on pressure. I mentioned somewhere here that pressure goes up as freespace is reduced so if you seat the bullet deeper pressure increases. Conversely the shallower you seat pressure is reduced. Of course there are limits to that because of coming in...
There is truth to this. The discrepancy is about 10% on the conservative side; that is published in the QL manual somewhere. QL tends to be conservative for most, not all, cartridges but following good hand-loading practices should keep you out of trouble. Never assume that there is a...
There's some good comments here and you will be able to find some good published data.
The 500 NE, like many of these large straight case cartridges, has it's roots in the black powder era. Obviously it has a very large case capacity so you will need to remain cognoscente of your load density...
This is what started me down this path. It's a 50-90 tipped with a 570gr Peregrine Bushmaster seated just off the lands. The best I was able to get out of it was 2018fps, about 140fps short of my. minimum goal. That's certainly enough UMPH but goals are goals.
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