First, the six measures we will be testing here: Lee Perfect, RCBS Uniflow, Forster Bonanza Benchrest, Hornady L-N-L Bench Rest, Redding BR-30 and Harrell’s Precision Premium BR, in ascending price order. We tested them with four powders: Hodgdon VarGet, Vihtavuori N140, IMR-4064 and Hodgdon Hybrid 100V, a stick-type with rounded ends that is claimed to meter as well as ball powders. IMR-4064, on the other hand, has a reputation for problems, including trapped kernels causing rotors to stick and ‘bridging’ in the measure drop tube.
Design-wise, the sextet covered most types, apart from the Lyman #55 and its unique horizontal slides. The Lee, Hornady, Redding, and RCBS examples have conventional rotor designs with their screw-type metering cylinders sticking out towards the operator – all performed smoothly. Forster’s Bonanza Bench Rest…
