ok guys shootin 243ai loading 70gr sierra blitzkings,with n140. Went to range today to test my loads out and ended up with soot around length of case and around the rim. THe loads were laddered from 38.3-39.2 in increments of .3gr. Now here is the kicker they were seated at sierras coal of 2.670. Which gave me not much more than a bullet diameter seated in case. Federal brass full length sized . rem 9.5 primers. I also shot some other 85 gr gamekings today that did not soot up at all so i know its not my chamber. Do i need to maybe seat these bullets deeper in case? As this is not a low pressure load. If i seat deeper it would give me like .050-.070 jump is this normal for lighter bullets? First time this has happened to me the cses have only been reloaded 3 Times.