Not all yanks are devoid of appreciation for the Lee rifles!

I used to own a pile of them. Alas, all sold now, but this thread is inspiring of another project.

The .35 sounds good, as does a .36-.303, that is, 9.3. That caliber would allow use of .375 bullets sized down to .366, as well as regular 9.3's. You should be able to resize 9.3's to .358 if you like, which gives you a whole new shopping list of bullets.

Advantage of .375 or sizing down to 9.3 is that there are several light-for-caliber bullets in .375 that should work very well in a .303 case; 200 Sierra, 235 Spper, 220 Hornady and 225 Hornady. The latter I've used with great success in the 9.3x57 which gives a bit more bvelocity than the .303 case will, but in the smaller capacity .303, that 225 should sct purely as a controlled expansion bullet of real "Premium" performance, as well as shooting flat.

I'm betting on the 200 Hornady Spire Point as a dandy in the .35 as well as the Game Kings you are working with. Great project and please keep us posted, too!