I've been doing ok with cast lead and lube/gc in my Pattern 14 and No4Mk1 but figured I'd try some PP. I've been doing ok with it in my Krag so am going to expand my efforts.
I figure, the Lee 200 gr drops at .309. I might size to .308 for kicks.
2 wraps should bring that up to 316 or so. I shouldn't even have to size after wrapping, maybe a touch of LLA.
I haven't slugged the bore- it doesn't lead with .314 so I'm guessing it's around there anyhow- but if the .316 will chamber, all should be fine.
Now here's the rub. Usually when I try going oversized like this, things bind in the seating die. I have an 'extra' set of RGB Lee dies that I could probably lap out with a little grinding compound for this. But I'm going to be really cheap first- let's see how the .316 fits the neck with NO SIZING! If I could load with a mid to slow burning powder (slower than 4895) and top off with PSB or similar, I could just press fit the bullets and chamber them, no?
Only issue I see with that is lack of pressure on ignition due to lack of neck tension yields inconsistent results, but we can always try.
Hmmm... another possibility might be to seat in an 8mm Mauser die and then use the 303 crimp if needed....
Just thinking out loud.