Have tried H4198 and IMR4198 with 25gn bullets and speeds were about ~3300fps before filling the case with powder. Quicker burning can N120 give an extra 200fps but at primer blowing pressure.
I have yet to test but I suspect the 4198s will be perfect with 30gn bullets.
I have now got hold of Lovex D063 (or old Accurate Arms 1680) which I suspect will give fast velocities more safely. Wilson & Wilson Fieldsports in Manston has some. Also Brock & Norris was recently very helpful getting some to a shooting buddy.