Not knowing the intended use it tough. But most double rifles are not long range guns.

Were it mine, I would pick the 240 gr Woodleigh which was some shape.

IME (limited) with several 2 rifle over 1 shotgun, drillings you can get almost anything to produce acceptable hunting accuracy with load tweaking.

As the AR world has taught us, lighter bullets shoot just fine in fast twist barrels. Your's is probably 1 in 10", so I would regulate heavy.

Those drillings were 8 and 9.3 mm, set up for heavy soft points. Not too many light 9.3s but the 8 (scoped) would shoot 125 gr Sierras (no longer made) swaged down to .319 into 1.5" (5) @ 100. Actually killed a few woodchucks with it just to quiet the non-believers.

Sound like your's is a sweet rifle. I have 5 belted Super 30s. A wonderful cartridge.