mussd0,
looked in Graeme Wrights 3rd book P105
450 3 1/4 Nitro 480gn Woodleigh - full Nitro load & proof tested for doubles.
He uses the full 480gn loads prefers AR2213sc - but uses Dacron filler due to excessive airspace.
I would suggest you get this book & read it first as there can be issues loading this case - hang fires etc.
All primers were Federal 215
98gn - 2000fps
102gn - 2085fps

Have a read first - some NFB loads for this one on P145 - but smaller weight projectiles
93x64mm