3584ELK
05-12-2014, 11:50 PM
This may be more of a gunsmithing question than cast boolit subject, but I have an intriguing set of circumstances related to bore slugging my various rifles. First, let me say I have limited machining experience, but would rate myself as an above average boolit caster, having engineered a load or two with which I harvested an elk or two. Also, have a few handguns shooting boolits cast from Lee six banger moulds. Next, I have a fair understanding of how to read and handle a micrometer down to .0001” accuracy.
While slugging the bores of all but two of the rifles, I noticed a tendency of the slug to loosen up and become almost free in the rifling as it passed the mid-point going down towards the chamber. Strangely enough, the rifles on which this occurred have some age and erosion present in the bore. I did end up with slug measurements that made sense in all but one instance (an 8x57 Mauser slugging .3316”).
Is this a case of bore erosion, or am I seeing something else- perhaps the slug fits and begins to wear enough so that it slides more freely? It’s hard to believe its bore erosion, as some of the “loose” bores are also very new.
104752
While slugging the bores of all but two of the rifles, I noticed a tendency of the slug to loosen up and become almost free in the rifling as it passed the mid-point going down towards the chamber. Strangely enough, the rifles on which this occurred have some age and erosion present in the bore. I did end up with slug measurements that made sense in all but one instance (an 8x57 Mauser slugging .3316”).
Is this a case of bore erosion, or am I seeing something else- perhaps the slug fits and begins to wear enough so that it slides more freely? It’s hard to believe its bore erosion, as some of the “loose” bores are also very new.
104752