Which pellets or slugs for edgin leshiy 2 .30?

Good day everyone.

I just bought a used edgin leshiy 2 .30 350mm from the classifieds here and wondering what the general consensus is on the best pellets or slugs (that work in the normal mags not slugs mags) for it?

I was thinking of trying the jsb diablo and hades 44.75 depending on what im pesting but looking to explore other options as well.

Thanks for the help.