I shot these bullets for the first time today. 83.0g of 7828 with a fed 215 primer in a new neck sized win case shot a single ragged hole at 3600. I got home and went to clean the gun and using BMG 50, only got a faint green tinge on the patch after soaking for 10 minutes. I brushed the barrel 20 strokes with Montana Extreme, wet patched the solution out with 4 wet patches, dry patched. Then let the barrel soak with Montana 50 BMG once again and got only the very faintest amount of the lightest color of green once again...never any blue. These bullets are due a second look. I neck sized the cases and fired a second and third shot with this load.