Shooters Forum banner
1 - 2 of 2 Posts

·
Banned
Joined
·
548 Posts
The effect of seating to the lands is fairly complicated, and sometimes the effect on accuracy is overrated. The support given to the shank of the bullet by the case mouth AS IT ENGAGES THE LANDS is critical. If you are only 1/8th inch into the lands and the base of the bullet is released by the neck, the bullet will yaw in the throat anyway. Shallow seating can also cause large variations in starting pressure. You may be better off seating to the base of the neck and making sure you have full uniform neck grip and/or crimp while using cases fireformed to your chamber. This, combined with a mandrel type neck sizer may give you better groups than seating way out to touch the lands.
 

·
Banned
Joined
·
548 Posts
Denurban -

Not to worry...the 25-06 never gets over 85% load density and the 25 cal bullets displace mostly air when seated deeply. As for your 75 grainers, try to shoot the longest bullet available. Measure length by taking one and inserting it gently in the muzzle of you rifle and turning it back and forth to get an imprint of the lands as a faint ring on the bullet. Choose one where this ring is as far as possible from the base and you will get a bullet that seats as far into the neck for good support when you seat to the lands.
 
1 - 2 of 2 Posts
Top