A project I did last year and thought it might be useful to some (exploded view of die). I made/modified a seater stem that contacts the bullet at the minor diameter of the barrel (.256”), which has likely been done often before. In this case for a 6.5mm (.264” grooves / .256” lands). What is different and was concerning was that pushing so low on the bullet may introduce some runout at the tip of the bullet. So a sliding “tip guide” was made to keep the bullet absolutely straight as it is seated in the case. The spring only exerts enough force to keep the guide tight on the point of the bullet. The spring force is adjustable with the set-screw and could never be enough to actually seat the bullet.
By having the seater stem contact the bullet at the barrels minor diameter, any bullet used will result in the bullet jump being the same, without changing the die setting. Does any of this really matter? Been done before? Just food for thought, and your mileage may vary.
By having the seater stem contact the bullet at the barrels minor diameter, any bullet used will result in the bullet jump being the same, without changing the die setting. Does any of this really matter? Been done before? Just food for thought, and your mileage may vary.
