noflyers,
good calibre you have there - i love my 260Rem custom.
Others will be along to comment but here is what works for me:
- Nosler custom brass (expensive but saves fannying around with case prep)
- Redding type S bushing neck dies (can't remeber the bushing size at the moment) - neck size only and trim when necessary...
- COAL: 2.775
Load:
- 139gr Lap Scenars
- CCI BR primers
- 43gr Viht N160
It is a fairly hot load so I would recommend starting 10% lower and working up to check it is okay in your rifle. For me this yeilds 2680fps (+/- 16fps)through a 26inch barrel. I regularly shoot up to 1200 yards with good results.
PS - I use the same press as you! There are folks with very strong opinions of what is a good (or bad) press. Frankly until I get much better/more experience with reloading the Lee will be just fine. I would spend your money on decent dies - again just my opinion.