Can anyone offer some load advice for 185gn Lapua Scenars and 200gn Sierra MKs? After a friend came shooting at my 600m gongs with 190gn Sierras I noticed a very big difference in the reaction on the steel. My 167gn Scenars just budge the gongs, the 190's make them swing and flay in an impressive way. The aim is more residual energy @ 600m for hunting. Thanks.