So far, I've had OK results with both of the barrels.

The .22 Hornet is giving around 2250 fps with a 40 grain bullet and H-110, and staying under an inch at 50 yards.

The .30-30 is doing around 1500 fps with a 170 grain bullet and H-4198, and is holding around an inch, also at 50 yards.

Both of these have a significant muzzle blast, as could be expected.