im rather new to sharps shooting and recently bought 20lbs of 20:1 from a reputable source.The RCBS 535 grain Postal Bullets poured and filled out great at .459 After pouring i waited about an hour and then proceeded to lube them with blue soft from Verals.I measured the overall length of the bullet and they all measured 1.418
Once i ran the bullet in my RCBS .460 lube die i measured the overall bullet length again and it measured 1.408-1.410 That is .010 shorter.
My question: Is this nose slump and what affect does or will it have on accuracy?
Im shooting a Pedersoli 1874 sharps with smokeless powder