Appreciate this thread!! I'm considering both an elliptical in 40 cal and trying some of the 97/1.5/1.5. Not necessarily at the same time but I suppose it could work out that way.
Am I correct to gather that 1.5 x diameter for nose length is the optimal? The one I'm considering has .750 in front of a 1.25 bore diameter followed by first lube groove in a .408 groove. If I'm understanding this correctly 1.5 x .408 is .612 and if you were to include the 1.25 of bore diameter it would be even greater. Not sure that should be included but .750 is still greater than .750, so would backing off that be advisable?