I purchased this one a few minutes ago.
About 150 grs. .312" dia. Plain base
It was a Lee Group buy from a few yrs. back.
New , the mould has never been cast with.
Oh man, what a great score! Looks like a perfect candidate for BR in the groove pluss a BLL overcoat and ought to shoot really well in just about any .30-caliber rifle.
I have that mould and find it casts well, but also a bit light; i.e., ~140gr. v. 150gr. as specified. 8.5gr. Unique or 9.5gr. B. Dot work well with it in my '06, but maybe a grain less for either powder in the .30-30. Nice catch, Ben!
For a second I thought that was a copy of the "30 Plinker", a dedicated tumble lube design that just never seemed to work like we thought it would. I sincerely hope that works better for you than the Plinker did for me!