Forums
New posts
Search forums
What's new
Articles
Latest reviews
Author list
Classifieds
Log in
Register
What's new
Search
Search
Search titles and first posts only
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Forums
Rifles, Reloading, Optics, Equipment
Reloading
how do you find seating depth??
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="brentc" data-source="post: 583003" data-attributes="member: 16938"><p>This is my favorite method. However, I always pull the firing pin so that the bolt rides freely without cocking the action. With a resized case, the bolt should ride freely in the action while opening and closing the bolt without the firing pin. If the bullet is in the lands at all, there will be resistance. </p><p> </p><p>I start with a resized case with a bullet seated to where I know it's too long. You'll know it's too long because the bolt won't close. Then, I incrementally seat the bullet deeper by .005 until the bolt nearly closes. </p><p> </p><p>Once I get the bolt nearly closed I tighten to .001 increments until the bolt closes freely. I then open the bolt to feel for any resistance when reopening the bolt. (usually happens with a "pop" right at the top of the bolt stroke) If it has resistance I will seat the bullet in .001 increments until the resistance is completely gone. I will sometimes go through this process multiple times to ensure I'm comfortable with the measurement. </p><p> </p><p>When you have it seated perfectly there should be no resistance anywhere in the bolt manipulation process. Once you do it a couple times, it becomes really easy. </p><p> </p><p>Make sure you measure with a comparator or some sort of device to measure the length from the case head to the bullet ogive to get the most precise measurement. COAL is fine if you have to fit your rounds in a magazine, but if you want to tune your seating depth to the lands you need to know the ogive length from the case head. Bullet tips from every manufacturer have variance that will throw off your COAL measurement.</p></blockquote><p></p>
[QUOTE="brentc, post: 583003, member: 16938"] This is my favorite method. However, I always pull the firing pin so that the bolt rides freely without cocking the action. With a resized case, the bolt should ride freely in the action while opening and closing the bolt without the firing pin. If the bullet is in the lands at all, there will be resistance. I start with a resized case with a bullet seated to where I know it's too long. You'll know it's too long because the bolt won't close. Then, I incrementally seat the bullet deeper by .005 until the bolt nearly closes. Once I get the bolt nearly closed I tighten to .001 increments until the bolt closes freely. I then open the bolt to feel for any resistance when reopening the bolt. (usually happens with a "pop" right at the top of the bolt stroke) If it has resistance I will seat the bullet in .001 increments until the resistance is completely gone. I will sometimes go through this process multiple times to ensure I'm comfortable with the measurement. When you have it seated perfectly there should be no resistance anywhere in the bolt manipulation process. Once you do it a couple times, it becomes really easy. Make sure you measure with a comparator or some sort of device to measure the length from the case head to the bullet ogive to get the most precise measurement. COAL is fine if you have to fit your rounds in a magazine, but if you want to tune your seating depth to the lands you need to know the ogive length from the case head. Bullet tips from every manufacturer have variance that will throw off your COAL measurement. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Reloading
how do you find seating depth??
Top