stretchman25
32 Cal.
- Joined
- Feb 10, 2010
- Messages
- 16
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I have a .62 caliber rifle with a 1 in 66" twist and .014 deep lands. For years I wondered why patches continued to have blow by, or burn through, until I measured the bore and determined the depth of the lands. The bore measures .620 from the tops of the lands and .648 from the bottom of the grooves. I am currently using .020" thick cotton patching with an over the shot wad over to try and minimize patch damage, but still burn patches with a .615 round ball. Does anyone know where I could find thicker patching material, or have any suggestions for load development?