Originally Posted by MTDOGGER
I just got a 338 lapua with the tac 338 action, 28 inch rock barrel and ive been working up loads for it and every load i try i get a ejector mark. I cant figure it out. Im using fed 215 and started out with 87 gr of retumbo and went up to 93 with the same ejector mark. primers are not flat, and no hard bolt lift either. ive also tried h1000 and started with 87 gr and went to 90 and got the same mark. I just bought another 100 brass thinking maybe the lapua brass that i had was soft but got the same result. Im shooting the 300gr SMK and seated them from 20 thousanths off to just touching the lans. I dont no what the heck is the problem. Has anyone else had this issue with the stiller action or could it be something else. Any help would be appreciated and thanks in advance
When seating close to or touching the lands pressure will go dramatically.
Check a fired case and see if a bullet will go in the neck,(It should have 2 or 3 thousandths
clearance. If not, The necks need to be trimed.(They are longer than the neck chamber)
I would recomend backing off a minimum of 20 0r 30 thousandths and working up to max loads
I dont think it is Head space but it should be checked.
Let us know what you find.
J E CUSTOM