Achieving high hot-spot pressures with 0.9scale CH capsule implosions at the National Ignition Facility**

We are reporting on a series of indirect-drive 0.9scale CH capsule implosions (inner radius = 840 μm) fielded in low gas-fill (0.6 mg/cm³) hohlraums of 6.72 mm diameter. Thanks to the increase in case-to-capsule ratio we achieved good hot spot symmetry control near 33% cone-fraction and zero wavelength separation. As a result, we demonstrated hot spot pressures approaching 300 Gbar in fully-integrated layered DT implosions. However, pushing this design to higher velocity resulted in a reduction of neutron yield. Highly-resolved capsule simulations suggest that higher Au M-shell preheat due to a reduced Si-dopant fraction resulted in an increase in Atwood number at the ablator-ice interface. These results provide important scaling information for next-generation CH designs.