After reading Mr. Bell's results I started using 67mm plastic shells loaded to CIP standards
in my Manufrance Idal with 65mm chambers, proofed to 1,100Kg.
I only recently lengthened its forcing cones and have not yet tried it, but I expect a slightly
lower felt recoil, (though I am not sure I'll perceive it).

JC


"...it is always advisable to perceive clearly our ignorance." Charles Darwin