I started shooting silver tip bullets about 1965. At first I shot just 130 270 bullets. I only recovered two, but they weighed 98 and 100 grains. both shot into deer. I also shot one moose with3006 and 180 gr silver tips. I shot it three times recovered two which averaged 71% weight retention and the 3rd was a pass thru. Broadside about 100 yards. I had an acquaintance who was a market hunter in the 1950s . He used a 3006 with 150 silvertips for elk. No comments on the results except he kept using them.